diff --git a/rfx.go b/rfx.go
index 2087080..e2ccb67 100644
--- a/rfx.go
+++ b/rfx.go
@@ -1,6 +1,7 @@
 package reflux
 
 import (
+	"encoding/json"
 	"fmt"
 	"reflect"
 	"strconv"
@@ -657,9 +658,14 @@ func (r *rfx) Uint8() uint8 {
 
 // String 将当前值转换为 string 类型
 func (r *rfx) String() string {
-	result, err := cast.ToStringE(r.Any())
+	data := r.Any()
+	result, err := cast.ToStringE(data)
 	if err != nil {
-		panic(fmt.Sprintf("rfx: failed to convert to string: %v", err))
+		if b, e := json.Marshal(data); e == nil {
+			result = string(b)
+		} else {
+			panic(fmt.Sprintf("rfx: failed to convert to string: %v", err))
+		}
 	}
 	return result
 }