Abstract: 【Objective/Meaning】Although the development momentum of cross-strait agricultural product trade is getting better and better, there are still some problems and obstacles. In order to promote the high-quality development of cross-strait agricultural product trade, it is particularly necessary to conduct a detailed study on the complementarity of bilateral agricultural product trade.【Methods/Procedures】Based on the data of UN Comtrade in 2018, on the basis of analyzing the current situation of cross-strait agricultural product trade, the RCA index, TCI index, TII index and GL index of cross-strait agricultural products were calculated, and the trade complementarity of cross-strait agricultural products was analyzed from the perspectives of all agricultural products and specific agricultural products. 【Results/Conclusions】The study found that although both sides of the Taiwan Straits were competitive in the trade of some agricultural products, there were strong trade complementarities in most agricultural products. Therefore, both sides of the Taiwan Straits could carry out much deeper trade cooperation in the agricultural products with strong complementarities such as fruits, vegetables, sugars, plant fibers, dairy products, etc., so as to achieve the development of the potential for trade and the expansion of trade space and the scale.