Abstract: The reclamation of land in the Imperial Garden Nanyuan was prohibited under“traditional ancestral Rule,”which reflected national Manchu characteristics of Archery hunting. Although the government frequently repeated the prohibition, these prohibition were ultimately ineffective. The phenomenon of private cultivation became more and more serious after the Jiaqing and Daoguang reigns and there had been proposals to cancel the ban for various reasons in the Xianfeng and Tongzhi reigns. Unfortunately，these proposals were repeatedly rejected，because ancestral rules were always more important than the people’s livelihood in the eyes of the Emperor. By the end of Guangxu reign, Nanyuan was fully opened, and the rules forbidding reclamation finally succumbed to economic pressure and peoples’livelihood. For the Qing Court, whether or not Nanyuan was reclaimed was a political rather than an economic problem，which related to the foundation of country. With the decline of Qing Dynasty, the ancestral rules finally gave way to economic demands．