本文依贸易影响力指数模型,从进口、出口以及进出口贸易比较三个视角分析了中美、中日贸易关系对两岸贸易关系的影响。在出口贸易方面,中美贸易对两岸贸易关系的影响大于中日贸易;在进口贸易方面,中日贸易对两岸贸易关系的影响大于中美贸易;从进出口贸易比较看,两岸进口贸易受中美、中日贸易关系 This article analyzes the impact of Sino-U.S. Trade relations on the trade relations across the Taiwan Strait from the three perspectives of import, export and import and export trade according to the trade influence index model. In terms of export trade, the impact of Sino-U.S. Trade on cross-Strait trade is greater than that of Sino-Japanese trade. On the import side, the impact of Sino-Japanese trade on cross-Strait trade is greater than that of Sino-U.S. Trade. From the comparison of import and export trade, The United States, China-Japan trade relations