Abstract: From the mid-Ming Dynasty to the early Qing Dynasty, Tumet mongols were always nomadic.the officials possessed more land than the civilians . There weren’t also the contracts at that time. Eight years of Qianlong, the Qing court distributed Hukoudi among the Tumet mongols. Since then, they controlled their land more freely. With the government's policies , a large number of the Minren entered the Guihuacheng Tumet area , and the trade became more prosperous . These factors made the investment in land bring considerable profits to the people. The ownership awareness of the Minren and the mongols grew stronger , they began to determine land ownership by the contracts. The goverment gave implicit consent to the Minren leasing the land from the mongols forever , and used the contracts as the import evidences when they settled lawsuits . As a result , the contracts had the force of law. From that time, the contracts always existed and became popular. In the conflict between two cultures , Tumet mongols learned the land ownership concepts of the Han to fight for benefit on their own initiative. Through hundreds of years ,the livelihoods of Tumet mongols graded gradually from pasturing to collectting rents , and Guihuacheng Tumet area went from the vast grassland into the wide farmland.