The article discusses the importance of regional tourism cooperation in Liaoning Province's triangle zone. The researchers analyze the challenges and opportunities for cooperation among the cities of Shenyang, Dalian, and Dandong. They suggest that traditional ideas, administrative barriers, and market overlap are key obstacles to cooperation. The researchers propose a mechanism for cooperation, including participant arrangements and operating mechanisms. They also recommend strategies like introducing new areas, integrating resources, and developing unique tourism products to enhance regional tourism cooperation in the area.