diff --git a/log/filter.go b/log/filter.go
index c6ef7f605..a5c818f17 100644
--- a/log/filter.go
+++ b/log/filter.go
@@ -72,23 +72,24 @@ func (h *Filter) filter(level Level, keyvals []interface{}) bool {
 	if len(keyvals)%2 == 0 {
 		for i := 0; i < len(keyvals); i += 2 {
 			if h.filterKey != nil {
-				if _, ok := h.filterKey[keyvals[i].(string)]; ok {
-					keyvals[i+1] = "***"
+				if v, ok := keyvals[i].(string); ok {
+					if _, ok := h.filterKey[v]; ok {
+						keyvals[i+1] = "***"
+					}
 				}
 			}
 			if h.filterValue != nil {
-				if _, ok := h.filterValue[keyvals[i].(string)]; ok {
-					keyvals[i] = "***"
-				}
-				if _, ok := h.filterValue[keyvals[i+1].(string)]; ok {
-					keyvals[i+1] = "***"
+				if v, ok := keyvals[i+1].(string); ok {
+					if _, ok := h.filterValue[v]; ok {
+						keyvals[i+1] = "***"
+					}
 				}
 			}
 		}
 	} else {
 		for i := 0; i < len(keyvals); i++ {
-			if h.filterValue != nil {
-				if _, ok := h.filterValue[keyvals[i].(string)]; ok {
+			if v, ok := keyvals[i].(string); ok {
+				if _, ok := h.filterValue[v]; ok {
 					keyvals[i] = "***"
 				}
 			}
diff --git a/log/filter_test.go b/log/filter_test.go
index b5b2be9fa..11ce79f46 100644
--- a/log/filter_test.go
+++ b/log/filter_test.go
@@ -1,6 +1,7 @@
 package log
 
 import (
+	"fmt"
 	"testing"
 )
 
@@ -15,7 +16,7 @@ func TestFilterAll(t *testing.T) {
 	log.Log(LevelDebug, "msg", "test debug")
 	log.Info("hello")
 	log.Infow("password", "123456")
-	log.Infow("username", "test debug")
+	log.Infow("username", "kratos")
 	log.Warn("warn log")
 }
 func TestFilterLevel(t *testing.T) {
@@ -58,3 +59,9 @@ func testFilterFunc(level Level, keyvals ...interface{}) bool {
 	}
 	return false
 }
+
+func TestDY(t *testing.T) {
+	kvs := []interface{}{}
+	//s := kvs[0].(string)
+	fmt.Println(fmt.Sprint(kvs[0]))
+}
\ No newline at end of file