汉代北部边郡屡遭匈奴之害,西汉为此长年屯兵北境。为了解决驻军的军粮问题,政府需要从内郡千里运粮至边郡。西汉中期以来,随着军队屯田政策的施行与北部边郡农业开发的顺利开展,西汉政权大胆改革创新,将内地征粮制改为从边郡市场籴粮,同时配套实施大规模移民实边,支持发展粮食贸易等政策,不仅节约了政府的巨额开支,减少了百姓的赋税徭役,也有力推动了边疆开发。东汉时期政府实施边民内迁政策,加之受到自然灾害的影响,这一制度逐步被取代,但是这一制度对后世产生了深远影响。 The northern county of Han Dynasty was repeatedly victimized by the Huns, for many years the Western Han Dynasty troops stationed in the northern border. In order to solve the garrison’s military issue of food, the government needs to transport grain from Nei Wan to Bien Hoa County. Since the mid-Western Han Dynasty, with the implementation of the army’s Tuntian policy and the successful development of agricultural development in the northern Bien Hoang, the Western Han Dynasty has boldly reformed and innovated the system of levying grain from the Mainland to enriching grain from the Bianjun market and at the same time supporting the implementation of large- Supporting the development of such policies as grain trade not only saved huge amounts of government spending but also reduced people’s taxation and military service, which in turn promoted the development of frontier areas. In the period of the Eastern Han Dynasty, the government implemented the policy of migrant migration while the influence of natural disasters was gradually replaced by the system of natural disasters. However, this system had a far-reaching impact on later generations.