diff --git a/src/main/java/org/redkale/util/Copier.java b/src/main/java/org/redkale/util/Copier.java
index 9b3178600..6e399ed09 100644
--- a/src/main/java/org/redkale/util/Copier.java
+++ b/src/main/java/org/redkale/util/Copier.java
@@ -16,6 +16,7 @@ import static org.redkale.asm.Opcodes.ACC_PUBLIC;
 import static org.redkale.asm.Opcodes.ACC_STATIC;
 import static org.redkale.asm.Opcodes.ACC_SUPER;
 import static org.redkale.asm.Opcodes.ACC_SYNTHETIC;
+import static org.redkale.asm.Opcodes.ACONST_NULL;
 import static org.redkale.asm.Opcodes.ALOAD;
 import static org.redkale.asm.Opcodes.ARETURN;
 import static org.redkale.asm.Opcodes.ASTORE;
@@ -24,6 +25,7 @@ import static org.redkale.asm.Opcodes.GETFIELD;
 import static org.redkale.asm.Opcodes.GOTO;
 import static org.redkale.asm.Opcodes.IFEQ;
 import static org.redkale.asm.Opcodes.IFLE;
+import static org.redkale.asm.Opcodes.IFNONNULL;
 import static org.redkale.asm.Opcodes.IFNULL;
 import static org.redkale.asm.Opcodes.INSTANCEOF;
 import static org.redkale.asm.Opcodes.INVOKEINTERFACE;
@@ -371,6 +373,9 @@ public interface Copier<S, D> extends BiFunction<S, D, D> {
             if (srcColumnPredicate != null) {
                 if (nameAlias != null) {
                     return (S src, D dest) -> {
+                        if (src == null) {
+                            return null;
+                        }
                         Map d = (Map) dest;
                         ((Map) src).forEach((k, v) -> {
                             if (srcColumnPredicate.test(null, k.toString()) && valPredicate.test(v)) {
@@ -381,6 +386,9 @@ public interface Copier<S, D> extends BiFunction<S, D, D> {
                     };
                 } else {
                     return (S src, D dest) -> {
+                        if (src == null) {
+                            return null;
+                        }
                         Map d = (Map) dest;
                         ((Map) src).forEach((k, v) -> {
                             if (srcColumnPredicate.test(null, k.toString()) && valPredicate.test(v)) {
@@ -392,6 +400,9 @@ public interface Copier<S, D> extends BiFunction<S, D, D> {
                 }
             } else if (nameAlias != null) {
                 return (S src, D dest) -> {
+                    if (src == null) {
+                        return null;
+                    }
                     Map d = (Map) dest;
                     ((Map) src).forEach((k, v) -> {
                         if (valPredicate.test(v)) {
@@ -404,6 +415,9 @@ public interface Copier<S, D> extends BiFunction<S, D, D> {
             return new Copier<S, D>() {
                 @Override
                 public D apply(S src, D dest) {
+                    if (src == null) {
+                        return null;
+                    }
                     if (options == 0) {
                         ((Map) dest).putAll((Map) src);
                     } else {
@@ -458,6 +472,17 @@ public interface Copier<S, D> extends BiFunction<S, D, D> {
             {
                 mv = (cw.visitMethod(ACC_PUBLIC, "apply", "(" + srcDesc + destDesc + ")" + destDesc, null, null));
                 //mv.setDebug(true);
+                {
+                    //if(src == null) return null;            
+                    mv.visitVarInsn(ALOAD, 1);
+                    Label ifLabel = new Label();
+                    mv.visitJumpInsn(IFNONNULL, ifLabel);
+                    mv.visitInsn(ACONST_NULL);
+                    mv.visitInsn(ARETURN);
+                    mv.visitLabel(ifLabel);
+                    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
+                }
+
                 mv.visitVarInsn(ALOAD, 1);
                 mv.visitVarInsn(ALOAD, 2);
                 mv.visitInvokeDynamicInsn("accept",
@@ -577,7 +602,17 @@ public interface Copier<S, D> extends BiFunction<S, D, D> {
         } else { //JavaBean -> Map/JavaBean
             mv = (cw.visitMethod(ACC_PUBLIC, "apply", "(" + srcDesc + destDesc + ")" + destDesc, null, null));
             //mv.setDebug(true);
-
+            {
+                //if(src == null) return null;            
+                mv.visitVarInsn(ALOAD, 1);
+                Label ifLabel = new Label();
+                mv.visitJumpInsn(IFNONNULL, ifLabel);
+                mv.visitInsn(ACONST_NULL);
+                mv.visitInsn(ARETURN);
+                mv.visitLabel(ifLabel);
+                mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
+            }
+            
             for (java.lang.reflect.Field field : srcClass.getFields()) {
                 if (Modifier.isStatic(field.getModifiers())) {
                     continue;
diff --git a/src/test/java/org/redkale/test/util/CopierTest.java b/src/test/java/org/redkale/test/util/CopierTest.java
index 97449d5a0..31a22a87e 100644
--- a/src/test/java/org/redkale/test/util/CopierTest.java
+++ b/src/test/java/org/redkale/test/util/CopierTest.java
@@ -35,6 +35,7 @@ public class CopierTest {
         test.run16();
         test.run17();
         test.run18();
+        test.run19();
     }
 
     @Test
@@ -277,9 +278,82 @@ public class CopierTest {
         Copier.load(Bean4.class, Bean5.class, Copier.OPTION_SKIP_NULL_VALUE).apply(bean1, bean2);
         System.out.println(JsonConvert.root().convertTo(bean2));
         Assertions.assertEquals(0, bean2.getSeqno());
+    }
+
+    @Test
+    public void run19() throws Exception {
+        Bean0 bean1 = new Bean0();
+        bean1.setCartype(111); 
+        bean1.setUsername("aaa");
+        Bean0 bean2 = new Bean0();
+        Copier.load(Bean0.class, Bean0.class, Copier.OPTION_SKIP_NULL_VALUE).apply(bean1, bean2);
+        System.out.println(JsonConvert.root().convertTo(bean2));
+        Assertions.assertEquals("aaa", bean2.getUsername());
         System.out.println("------------------------------------------");
     }
 
+    public class Bean0 {
+
+        private long carid;
+
+        private int cartype;
+
+        private int userid;
+
+        private String username;
+
+        private String cartitle;
+
+        public Bean0() {
+        }
+
+        public long getCarid() {
+            return carid;
+        }
+
+        public void setCarid(long carid) {
+            this.carid = carid;
+        }
+
+        public int getUserid() {
+            return userid;
+        }
+
+        public void setUserid(int userid) {
+            this.userid = userid;
+        }
+
+        public String getCartitle() {
+            return cartitle;
+        }
+
+        public void setCartitle(String cartitle) {
+            this.cartitle = cartitle;
+        }
+
+        public int getCartype() {
+            return cartype;
+        }
+
+        public void setCartype(int cartype) {
+            this.cartype = cartype;
+        }
+
+        public String getUsername() {
+            return username;
+        }
+
+        public void setUsername(String username) {
+            this.username = username;
+        }
+
+        @Override
+        public String toString() {
+            return JsonConvert.root().convertTo(this);
+        }
+
+    }
+
     public class Bean1 {
 
         public String intval;