Based on data from China’s customs trade database from 2000 to 2015， this paper studies the breadth and depth of enterprises’ export from the “enterprise-product-destination” dimension ，and then analyzes the impact of regional reputation for quality of agricultural products on the dual margins of enterprises’ export. The results show that the impact of regional reputation of agricultural products quality on enterprises’ export intensive margin is stronger than on the extensive margin， and the marginal promotion effects on enterprises’ export extensive margin is as follows： export of old products to new markets（ln em-1）is larger than export of new products to old markets（ln em-2）which in turn is larger than export of new products to new markets（ln em-3）. In addition， the paper finds that the impact of regional reputation of quality on the dual margin of agricultural exports has significant enterprise heterogeneity and regional heterogeneity. Further mechanism test shows that regional reputation of quality affects the dual margins of enterprises’ export mainly through“the effect of reputation premium”and “the effect of competitive agglomeration”. Finally， this paper puts forward some suggestions on cultivating a good regional quality reputation of agricultural products and promoting the sustainable development of China’s agricultural export trade.