By using HS classification, the author has divided total agricultural products into 24 categories. The paper calculated the G-L intra-industry trade index, Brülhart marginal intra-industry trade index, and Thom & McDowell marginal industry trade index for each type of agricultural products during the period from 1996 to 2005 in China. The conclusion shows the overall level of agricultural intra-industry trade is relatively low, and Brülhart index indicates China’s agricultural products decades of improvement mainly from inter-industry trade, at the same time Thom & McDowell index shows that China’s agricultural intra-industry trade growth is mainly from the growth of vertical intra-industry trade.