diff --git a/src/org/redkale/convert/DeMember.java b/src/org/redkale/convert/DeMember.java
index 826351552..ebd84780c 100644
--- a/src/org/redkale/convert/DeMember.java
+++ b/src/org/redkale/convert/DeMember.java
@@ -26,6 +26,8 @@ public final class DeMember<R extends Reader, T, F> {
 
     protected int position; //从1开始
 
+    protected int tag; //主要给protobuf使用
+
     protected final Attribute<T, F> attribute;
 
     protected Decodeable<R, F> decoder;
@@ -84,6 +86,10 @@ public final class DeMember<R extends Reader, T, F> {
         return this.position;
     }
 
+    public int getTag() {
+        return this.tag;
+    }
+
     public int compareTo(boolean fieldSort, DeMember<R, T, F> o) {
         if (o == null) return -1;
         if (this.position != o.position) return (this.position == 0 ? Integer.MAX_VALUE : this.position) - (o.position == 0 ? Integer.MAX_VALUE : o.position);
diff --git a/src/org/redkale/convert/ObjectDecoder.java b/src/org/redkale/convert/ObjectDecoder.java
index 827fac59a..aed4973c1 100644
--- a/src/org/redkale/convert/ObjectDecoder.java
+++ b/src/org/redkale/convert/ObjectDecoder.java
@@ -178,6 +178,7 @@ public class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T> {
                         while (pos.contains(++pidx));
                         member.position = pidx;
                     }
+                    initForEachDeMember(factory, member);
                 }
                 Arrays.sort(this.members, (a, b) -> a.compareTo(factory.isFieldSort(), b));
 
@@ -205,6 +206,13 @@ public class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T> {
         }
     }
 
+    protected void initForEachDeMember(ConvertFactory factory, DeMember member) {
+    }
+
+    protected void setTag(DeMember member, int tag) {
+        member.tag = tag;
+    }
+
     /**
      * 对象格式: [0x1][short字段个数][字段名][字段值]...[0x2]
      *