Abstract: Tin is an important strategic mineral resource, are widely used in high-tech fields such as aerospace and national defense.Although China is a large country of tin resources, due to the rapid industrialization demand, China's tin resources are rapidly consumed, and its advantages continue to weaken.Moreover, China has turned from net exports to net imports of the tin resources, and there are potential risks in supply security.The purpose of this research is to evaluate the potential risks of tin resource supply security in China.Based on the historical data and demand forecast data of the production, consumption and supply of tin resources in China, choose the resource guarantee degree, storage-production ratio, external dependence, import concentration, and demand growth rate are selected from the four dimensions of resource factors, supply factors, political factors and demand factors.The six indicators of national stability and demand growth rate are used to conduct quantitative and grading evaluation of China's tin resource supply risks.The results show that the risk levels are as follows:demand growth rate, import concentration, resource security, reserve-production ratio, and country of production.Stability and external dependence.It shows that the supply risks of tin resources in China mainly lie in the strong future demand, the relatively concentrated supply of resources, and the insufficient degree of resource protection.It also puts forward countermeasures and suggestions to explore and expand reserves and establish a reserve system, accelerate the distribution of overseas tin resources, and improve the utilization rate of domestic resources.