diff --git a/filter/filter_impl/generic_filter.go b/filter/filter_impl/generic_filter.go
index 36b4b13186..cf307d0ad8 100644
--- a/filter/filter_impl/generic_filter.go
+++ b/filter/filter_impl/generic_filter.go
@@ -122,15 +122,15 @@ func struct2MapAll(obj interface{}) interface{} {
 		}
 		return newTemps
 	} else if t.Kind() == reflect.Map {
-		var newTempMap = make(map[string]interface{}, v.Len())
+		var newTempMap = make(map[interface{}]interface{}, v.Len())
 		iter := v.MapRange()
 		for iter.Next() {
-			mapK := iter.Key().String()
 			if !iter.Value().CanInterface() {
 				continue
 			}
+			key := iter.Key()
 			mapV := iter.Value().Interface()
-			newTempMap[mapK] = struct2MapAll(mapV)
+			newTempMap[convertMapKey(key)] = struct2MapAll(mapV)
 		}
 		return newTempMap
 	} else {
@@ -138,6 +138,19 @@ func struct2MapAll(obj interface{}) interface{} {
 	}
 }
 
+func convertMapKey(key reflect.Value) interface{} {
+	switch key.Kind() {
+	case reflect.Bool, reflect.Int, reflect.Int8,
+		reflect.Int16, reflect.Int32, reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16,
+		reflect.Uint32, reflect.Uint64, reflect.Float32,
+		reflect.Float64, reflect.String:
+		return key.Interface()
+	default:
+		return key.String()
+	}
+}
+
 func setInMap(m map[string]interface{}, structField reflect.StructField, value interface{}) (result map[string]interface{}) {
 	result = m
 	if tagName := structField.Tag.Get("m"); tagName == "" {
diff --git a/filter/filter_impl/generic_filter_test.go b/filter/filter_impl/generic_filter_test.go
index 40cf743106..4203dd6dd8 100644
--- a/filter/filter_impl/generic_filter_test.go
+++ b/filter/filter_impl/generic_filter_test.go
@@ -98,15 +98,17 @@ func TestStruct2MapAllSlice(t *testing.T) {
 
 func TestStruct2MapAllMap(t *testing.T) {
 	var testData struct {
-		AaAa string
-		Baba map[string]interface{}
-		CaCa map[string]string
-		DdDd map[string]interface{}
+		AaAa   string
+		Baba   map[string]interface{}
+		CaCa   map[string]string
+		DdDd   map[string]interface{}
+		IntMap map[int]interface{}
 	}
 	testData.AaAa = "aaaa"
 	testData.Baba = make(map[string]interface{})
 	testData.CaCa = make(map[string]string)
 	testData.DdDd = nil
+	testData.IntMap = make(map[int]interface{})
 
 	testData.Baba["kk"] = 1
 	var structData struct {
@@ -117,14 +119,19 @@ func TestStruct2MapAllMap(t *testing.T) {
 	testData.Baba["nil"] = nil
 	testData.CaCa["k1"] = "v1"
 	testData.CaCa["kv2"] = "v2"
+	testData.IntMap[1] = 1
 	m := struct2MapAll(testData)
 
 	assert.Equal(t, reflect.Map, reflect.TypeOf(m).Kind())
-	assert.Equal(t, reflect.String, reflect.TypeOf(m.(map[string]interface{})["aaAa"]).Kind())
-	assert.Equal(t, reflect.Map, reflect.TypeOf(m.(map[string]interface{})["baba"]).Kind())
-	assert.Equal(t, reflect.Map, reflect.TypeOf(m.(map[string]interface{})["baba"].(map[string]interface{})["struct"]).Kind())
-	assert.Equal(t, "str", m.(map[string]interface{})["baba"].(map[string]interface{})["struct"].(map[string]interface{})["str"])
-	assert.Equal(t, nil, m.(map[string]interface{})["baba"].(map[string]interface{})["nil"])
-	assert.Equal(t, reflect.Map, reflect.TypeOf(m.(map[string]interface{})["caCa"]).Kind())
-	assert.Equal(t, reflect.Map, reflect.TypeOf(m.(map[string]interface{})["ddDd"]).Kind())
+	mappedStruct := m.(map[string]interface{})
+	assert.Equal(t, reflect.String, reflect.TypeOf(mappedStruct["aaAa"]).Kind())
+	assert.Equal(t, reflect.Map, reflect.TypeOf(mappedStruct["baba"]).Kind())
+	assert.Equal(t, reflect.Map, reflect.TypeOf(mappedStruct["baba"].(map[interface{}]interface{})["struct"]).Kind())
+	assert.Equal(t, "str", mappedStruct["baba"].(map[interface{}]interface{})["struct"].(map[string]interface{})["str"])
+	assert.Equal(t, nil, mappedStruct["baba"].(map[interface{}]interface{})["nil"])
+	assert.Equal(t, reflect.Map, reflect.TypeOf(mappedStruct["caCa"]).Kind())
+	assert.Equal(t, reflect.Map, reflect.TypeOf(mappedStruct["ddDd"]).Kind())
+	intMap := mappedStruct["intMap"]
+	assert.Equal(t, reflect.Map, reflect.TypeOf(intMap).Kind())
+	assert.Equal(t, 1, intMap.(map[interface{}]interface{})[1])
 }