屯田制度,早在西汉文帝时就已开始。而元代屯田,规模庞大,组织严密,遍及全国,为历朝之冠。《元史》称其“天下无不可屯之兵,无不可耕之田。”四川地区,尤其是成都平原的屯懇,在元代的成就也令人刮目相看。四川地处长江上游,南宋时“以三关为门户,五州为藩篱。”(三关,即七方关、仙人关、武休关。五州,即阶州、成州、西和州、凤州、天水军。)蒙古灭宋期间,对该地区频繁用 Tuntian system, as early as the Western Han Dynasty Emperor began. The Yuan Dynasty Tuntian, large-scale, well-organized, all over the country, as the highest in the dynasty. “Yuan history” calls it “the world can not be Tuen of the soldiers, no arable land.” “Sichuan Province, especially in the Chengdu Plain of Tun, achievements in the Yuan Dynasty is also impressive. Sichuan is located in the upper reaches of the Yangtze River, the Southern Song Dynasty, ”the gateway to the three for the five states as a fence." (Three off, that is, seven off, fairy pass, Wu Huaguan. And the state, Fengzhou, Tianshui Army.) Mongolian eliminate Song during the frequent use of the region