国际贸易是一把“双刃剑”,它既能促进地区经济发展,同时也会对本国的幼稚产业造成冲击。因此,现在世界上多数国家实行的贸易政策多数是有限的贸易自由政策,即贸易保护政策。传统上,关税是贸易保护的主要工具。但是,从1947年以来,在关税与贸易总协定的主持下,经过多次贸易谈判, International trade is a “double-edged sword”, which can not only promote regional economic development, but also cause impact on the country’s infant industry. Therefore, most of the trade policies implemented by most countries in the world today are limited trade freedom policies, that is, trade protection policies. Traditionally, tariffs are the main tool for trade protection. However, since 1947, under the auspices of the General Agreement on Tariffs and Trade, after many trade negotiations,