From 2018, as the US trade imbalance with China has grown, the US has slapped tariffs and high-tech export sanctions on China, and China has retaliated. This led to the beginning of a war between China and the United States over trade. This article will analyze the deeper reasons why the United States wants to use a war over trade to against China from the historical and current macro level and analyze the economic impact of the trade war on the two countries from three aspects: stock market, business, and currency. And compare the trade wars consequences with the goals that the United States hopes to achieve through the trade war to analyze whether this war has achieved good results for the United States. The research in this paper finds that the trade war has not brought the United States the results it sought to achieve. The trade war has influenced many industries, and it has caused the economies of the two countries to regress to varying degrees. This article hopes to give the reasons why the trade war is meaningless through research.