diff --git a/src/org/redkale/convert/bson/BsonConvert.java b/src/org/redkale/convert/bson/BsonConvert.java
index 05c583923..3cb27c157 100644
--- a/src/org/redkale/convert/bson/BsonConvert.java
+++ b/src/org/redkale/convert/bson/BsonConvert.java
@@ -55,6 +55,10 @@ public final class BsonConvert extends Convert<BsonReader, BsonWriter> {
         return (BsonFactory) factory;
     }
 
+    public static BsonConvert root() {
+        return BsonFactory.root().getConvert();
+    }
+
     //------------------------------ reader -----------------------------------------------------------
     public BsonReader pollBsonReader(final ByteBuffer... buffers) {
         return new BsonByteBufferReader(buffers);
diff --git a/src/org/redkale/convert/json/JsonConvert.java b/src/org/redkale/convert/json/JsonConvert.java
index 953cdc945..22d691775 100644
--- a/src/org/redkale/convert/json/JsonConvert.java
+++ b/src/org/redkale/convert/json/JsonConvert.java
@@ -42,6 +42,10 @@ public final class JsonConvert extends Convert<JsonReader, JsonWriter> {
         return (JsonFactory) factory;
     }
 
+    public static JsonConvert root() {
+        return JsonFactory.root().getConvert();
+    }
+
     //------------------------------ reader -----------------------------------------------------------
     public JsonReader pollJsonReader(final ByteBuffer... buffers) {
         return new JsonByteBufferReader(buffers);