Lanzhou incident is an important part of the Double Twelve Incident, which has positive historical significance and influence. The launching of the Lanzhou Incident strengthened Zhang and Yang's military strength and political negotiating position, which contributed to the peaceful settlement of the incident. It not only strengthened the momentum of the "December 12 Incident", but also shocked patriots from all walks of life in Gansu to save the country and the people. It also made the people of Gansu understand the party's political proposition of anti-Japanese national salvation to a certain extent, which had a great influence on the vigorous rise of the anti-Japanese national salvation movement under the leadership of the party in Gansu.