diff --git a/src/views/demonstration/deomonList/index.vue b/src/views/demonstration/deomonList/index.vue
index 745d8fa47..9da81c9be 100644
--- a/src/views/demonstration/deomonList/index.vue
+++ b/src/views/demonstration/deomonList/index.vue
@@ -103,16 +103,20 @@ export default {
 
 		},
 		async handleJoin() {
-			await getjointTraining(this.group);
-			if (this.state == '02') {
-				launchFullscreen();
-				await putJointTrainingSimulationEntrance(this.group);
-				const rest = await getPublishMapInfo(this.mapId);
-				const query = { skinStyle: rest.data.skinStyle, mapId: this.mapId, group: this.group };
-				this.$router.push({ path: `/jointTraining`, query: query });
-			} else if (this.state == '01') {
-				const query = { group: this.group };
-				this.$router.push({ path: `/trainroom`, query: query });
+			if (this.group) {
+				await getjointTraining(this.group);
+				if (this.state == '02') {
+					launchFullscreen();
+					await putJointTrainingSimulationEntrance(this.group);
+					const rest = await getPublishMapInfo(this.mapId);
+					const query = { skinStyle: rest.data.skinStyle, mapId: this.mapId, group: this.group };
+					this.$router.push({ path: `/jointTraining`, query: query });
+				} else if (this.state == '01') {
+					const query = { group: this.group };
+					this.$router.push({ path: `/trainroom`, query: query });
+				}
+			} else {
+				this.$message.info('您没有选择房间');
 			}
 		}
 	}