diff --git a/tools/pnnx/Releasenotes b/tools/pnnx/Releasenotes
index 2265078456a..b361f89c37d 100644
--- a/tools/pnnx/Releasenotes
+++ b/tools/pnnx/Releasenotes
@@ -23,4 +23,16 @@ dev.1.0.5.20240508
 2. Fix missing approximate parameters of nn.GELU
 
 dev.1.0.6.20240511
-1. Add new pass trans_Stack2Unsqueeze, When using torch.stack with a single input and effectively achieving the same result as torch.unsqueeze
\ No newline at end of file
+1. Add new pass trans_Stack2Unsqueeze, When using torch.stack with a single input and effectively achieving the same result as torch.unsqueeze
+
+dev.1.0.7.20240521
+1. add saveModel function
+
+dev.1.0.8.20240526
+1. To solve the memory issue in ptx
+
+dev.1.0.9.20240528
+1. Support multi dim in fuse_index_expression pass for Tensor.index
+
+dev.1.0.10.20240529
+1. Support parse multi dim list to string
\ No newline at end of file
diff --git a/tools/pnnx/src/parse/pnnx_ir_parse.cpp b/tools/pnnx/src/parse/pnnx_ir_parse.cpp
index 6036e1636b2..7c0bfe8855a 100644
--- a/tools/pnnx/src/parse/pnnx_ir_parse.cpp
+++ b/tools/pnnx/src/parse/pnnx_ir_parse.cpp
@@ -31,6 +31,18 @@
 using namespace pnnx;
 namespace pnnx_ir {
 
+static size_t countSubstring(const std::string& str, const std::string& substr) {  
+    size_t count = 0;  
+    size_t pos = 0;  
+  
+    while ((pos = str.find(substr, pos)) != std::string::npos) {  
+        ++count;  
+        pos += substr.length();  
+    }  
+  
+    return count;  
+} 
+
 static bool type_is_integer(int type)
 {
     if (type == 1) return false;
@@ -465,6 +477,25 @@ Attribute operator+(const Attribute& a, const Attribute& b)
 
 Parameter Parameter::parse_from_string(const std::string& value)
 {
+     if (value.find('%') != std::string::npos)
+    {
+        Parameter p;
+        p.type = 4;
+        p.s = value;
+        return p;
+    }
+    size_t count1 = countSubstring(value, "[");
+    size_t count2 = countSubstring(value, "]");
+    size_t count3 = countSubstring(value, "(");
+    size_t count4 = countSubstring(value, ")");
+    if(count1 > 1 || count2 > 1 || count3 > 1 || count4 >1)
+    {
+        Parameter p;
+        p.type = 4;
+        p.s = value;
+        return p;
+    }
+
     Parameter p;
     p.type = 0;
 
@@ -535,7 +566,6 @@ Parameter Parameter::parse_from_string(const std::string& value)
     p.i = std::stoi(value);
     return p;
 }
-
 Graph::Graph()
 {
 }
diff --git a/tools/pnnx/src/pass_level3/fuse_index_expression.cpp b/tools/pnnx/src/pass_level3/fuse_index_expression.cpp
index 59583913a26..0c8c4d8e48d 100644
--- a/tools/pnnx/src/pass_level3/fuse_index_expression.cpp
+++ b/tools/pnnx/src/pass_level3/fuse_index_expression.cpp
@@ -28,6 +28,40 @@ static void replaceAll(std::string& str, const std::string& from, const std::str
     }
 }
 
+static void multi_expr(int depth, std::vector<int>& attr_shape, const int64_t* pdata, std::string& attr_expr, int pre_depth, int& cur_index)
+{
+    if(depth == attr_shape.size() - 1)
+    {
+        attr_expr += "[";
+        for(int j = 0; j < attr_shape[attr_shape.size()-1]; j++)
+        {
+            int64_t n = pdata[cur_index + j];
+            attr_expr += std::to_string(n);
+            if( j != attr_shape[attr_shape.size()-1] - 1)
+            {
+                 attr_expr += ",";
+            }      
+        }
+        attr_expr += "]";
+        cur_index += attr_shape[attr_shape.size()-1];
+    }
+    else
+    {
+        int cur_dim = attr_shape[depth];
+        attr_expr += "[";
+        for(int i=0; i < cur_dim; i++)
+        {
+            multi_expr(depth+1, attr_shape, pdata, attr_expr, i, cur_index);
+            if (i != cur_dim -1)
+            {
+                attr_expr += ",";
+            }
+           
+        }
+        attr_expr += "]";
+
+    }
+}
 static std::string fuse_attribute_expression(Operator* op_expr)
 {
     std::string expr = op_expr->params["expr"].s;
@@ -57,20 +91,35 @@ static std::string fuse_attribute_expression(Operator* op_expr)
             }
             attr_expr += "]";
         }
+        // else if (attr.type == 5)
+        // {
+        //     // i64
+        //     const int64_t* pdata = (const int64_t*)attr.data.data();
+        //     attr_expr += "[";
+        //     for (int j = 0; j < count; j++)
+        //     {
+        //         int64_t n = pdata[j];
+        //         attr_expr += std::to_string(n);
+
+        //         if (j != count - 1)
+        //             attr_expr += ",";
+        //     }
+        //     attr_expr += "]";
+        // }
         else if (attr.type == 5)
         {
             // i64
             const int64_t* pdata = (const int64_t*)attr.data.data();
-            attr_expr += "[";
-            for (int j = 0; j < count; j++)
+            int depth = 0;
+            int attr_shape_size = attr.shape.size();
+            std::vector<int> attr_shape;
+            for(int i = 0; i < attr_shape_size; i++)
             {
-                int64_t n = pdata[j];
-                attr_expr += std::to_string(n);
-
-                if (j != count - 1)
-                    attr_expr += ",";
+                attr_shape.push_back(attr.shape[i]);
             }
-            attr_expr += "]";
+            int pre_depth = 0;
+            int cur_index = 0;
+            multi_expr(depth, attr_shape, pdata, attr_expr, pre_depth, cur_index);
         }
         else
         {
diff --git a/tools/pnnx/src/py_proj.cpp b/tools/pnnx/src/py_proj.cpp
index 03771719087..3f5ef016181 100644
--- a/tools/pnnx/src/py_proj.cpp
+++ b/tools/pnnx/src/py_proj.cpp
@@ -5,7 +5,7 @@
 // #include <torch/extension.h>
 #define STRINGIFY(x)       #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)
-#define MYLIBRARY_VERSION  "dev.1.0.6.20240511"
+#define MYLIBRARY_VERSION  "dev.1.0.10.20240529"
 using namespace pnnx_graph;
 using namespace pnnx_ir;
 namespace py = pybind11;
diff --git a/tools/pnnx/tools/export.py b/tools/pnnx/tools/export.py
index b2e6162fb86..fcfc0591179 100644
--- a/tools/pnnx/tools/export.py
+++ b/tools/pnnx/tools/export.py
@@ -15,7 +15,8 @@
     if platform.system() == "Windows":  
         sys.path.append('D:/project/programs/ncnn_project/nvppnnx/python/build/lib.win-amd64-cpython-38/pnnx')
     elif platform.system() == "Linux": 
-        sys.path.append('/workspace/trans_onnx/project/new_project/nvppnnx/python/build/temp.linux-x86_64-cpython-311/src')
+        # sys.path.append('/workspace/trans_onnx/project/new_project/nvppnnx/python/build/temp.linux-x86_64-cpython-311/src')
+        sys.path.append('/workspace/trans_onnx/project/new_project/ncnn/tools/pnnx/python/build/temp.linux-x86_64-cpython-311/src')
     else:    
         assert False, "noly support win and linux"
     import ptx
@@ -38,19 +39,19 @@
 # def models 
 #-------------------------------------------
 
-class takeModel(nn.Module):
+class IndexModel(nn.Module):
     def __init__(self,):
-        super(takeModel, self).__init__()
-        
-    def forward(self, v_0):
-        # indices = torch.tensor([0,2], dtype=torch.long) 
-        indices= torch.tensor([
+        super(IndexModel, self).__init__()
+        self.indices= torch.tensor([
             [0, 1],
             [1, 2],
         ], dtype=torch.long) 
+    def forward(self, v_0):
+        # indices = torch.tensor([0,2], dtype=torch.long) 
+        
         # gathered = torch.gather(v_0, dim=3, index=indices)  
-        # gathered = v_0[:,indices]
-        gathered = v_0[indices,:]
+        gathered = v_0[:,self.indices,self.indices,:]
+        # gathered = v_0[self.indices,:]
         return gathered
     
 
@@ -114,22 +115,28 @@ def export(model_name: str, net: nn.Module, input_shape, export_onnx: bool):
 if __name__ == "__main__":
 
     net_map = {  
-    "take": takeModel,
+    "index2": IndexModel,
     "stack":stackModel
 } 
     
-    model_name = 'stack'
+    model_name = 'index2'
     if model_name in net_map:  
         net = net_map[model_name]()  
     else:  
         assert False, 'not found model_name: {} in net_map'.format(model_name)
 
-    input_shape = [[1,3, 224],[1,3,224]]
+    # input_shape = [[1,3, 224],[1,3,224]]
     # v_0 = torch.tensor( [
 	# 		[1.0, 1.2],
 	# 		[2.3, 3.4],
 	# 		[4.5, 5.7],
 	# 	])
-    # input_shape = [v_0]
+    v_0 = torch.tensor( [
+			[1.0, 1.2, 1.3],
+			[2.3, 3.4, 1.4],
+			[4.5, 5.7, 1.8],
+		])
+    v_0 = torch.rand([1,3,4,4], dtype= float)
+    input_shape = [v_0]
     export_onnx = True
     export(model_name, net, input_shape,export_onnx)
diff --git a/tools/pnnx/tools/pass_level7_dict.py b/tools/pnnx/tools/pass_level7_dict.py
index a6a4d4efbdd..1cb494ee44e 100644
--- a/tools/pnnx/tools/pass_level7_dict.py
+++ b/tools/pnnx/tools/pass_level7_dict.py
@@ -300,11 +300,15 @@ def run_pass(op,operator_dict, operand_dict):
     # input_shape_str = '[1,197,9,64],[1,197,9,64],[1,197,9,64]'
 
     # multi stack
-    example_name = 'multi_stack'
-    pt_path_str = 'D:/project/programs/ncnn_project/ncnn/tools/pnnx/model_zoo/stack/stack.pt' 
-    pt_path_str = '/workspace/trans_onnx/project/new_project/ncnn/tools/pnnx/model_zoo/stack/stack.pt'
-    input_shape_str = '[1,3,224],[1,3,224]'
-
+    # example_name = 'multi_stack'
+    # pt_path_str = 'D:/project/programs/ncnn_project/ncnn/tools/pnnx/model_zoo/stack/stack.pt' 
+    # pt_path_str = '/workspace/trans_onnx/project/new_project/ncnn/tools/pnnx/model_zoo/stack/stack.pt'
+    # input_shape_str = '[1,3,224],[1,3,224]'
+
+    # index
+    example_name = 'index'
+    pt_path_str = '/workspace/trans_onnx/project/new_project/ncnn/tools/pnnx/model_zoo/index/index.pt'
+    input_shape_str = '[3,2]'
     # custom_op_path_str = 
     # infer_py_path = 
     # pass_level7_path = 'D:/project/programs/ncnn_project/ncnn/tools/pnnx/pass_level7'