diff --git a/libs/robot_common/src/main/java/taurus/util/ChangShaSuanFaTest.java b/libs/robot_common/src/main/java/taurus/util/ChangShaSuanFaTest.java
index b45250f..3ebb02e 100644
--- a/libs/robot_common/src/main/java/taurus/util/ChangShaSuanFaTest.java
+++ b/libs/robot_common/src/main/java/taurus/util/ChangShaSuanFaTest.java
@@ -83,7 +83,8 @@ public class ChangShaSuanFaTest {
             if (!qys){
                 //检测同色牌有多少张
                 for (Map.Entry<String,List<Integer>> entry : cardst2.entrySet()) {
-                    if (entry.getValue().size()<=2){
+                    List<Integer> values = entry.getValue();
+                    if (values.size() > 0 && values.size() <= 2){
                         //如果只有一张同色，那就打这一张
                         return entry.getValue().get(0).toString();
                     }