Imposing tariffs has a great influence on the development of world trade. 2. Imposing tariffs affects the structure and geographical direction of import and export. 3. Affect the prices, production and sales of import and export commodities. 1 causes commodity prices to rise and consumers to suffer losses. (2) Increase the national fiscal revenue. (3) Protecting domestic industries and markets.

When major countries in the world generally raise tariffs and strengthen non-tariff barriers, not only will the number of import and export commodities in these countries decrease, but also the number of imported commodities will further decrease due to mutual influence and interaction, thus affecting the development of international trade. Other things being equal, the increase or decrease of tariff rates or the strengthening of non-tariff barriers in major countries in the world is inversely proportional to the development speed of international trade. Tariff wall mats and non-tariff barriers affect the changes of commodity structure and geographical direction in international trade to some extent.