Abstract: The impact of Sino-US trade friction on China sea ports are investigated according to the data from the trade database in China Customs.The data are divided into 7 categories.Generation coefficient calculation models for different categories are built after analyzing the additional tariffs list of US and improved with multiple factor dynamic generation coefficient.The Quantitative analysis of the impact is performed with the models.The analysis indicates that the commodity of total 250 billion US dollar for first round and second round tariff increase corresponds to 8 million TEU and 1.2-3 million TEU reduction is estimated.Actual data in the period of 2018-2019 proved the result.