Abstract: The high-quality development of manufacturing is regarded as an important part of China's efforts to build a modern economic system. The high-quality development of manufacturing depends on the supply chain. However, the current international trade friction intensifies, which leads to the instability of the global supply chain on which enterprises depend for survival, and brings challenges to the globalization development of China's manufacturing supply chain. The imposition of tariffs as a measure of trade protection has exacerbated trade frictions. Therefore, in the context of international trade disputes and high-quality national economic development, it is particularly important to carry out research on global supply chain’s decision-making. The decision-making of global supply chains is studied under the perspective of tariff increases.

Key words: multinational supply chain; import tariff; government subsidy; supply chain decisions; social welfare