At present, China is facing very serious currency mismatch, and this has brought about some negative impacts on China's economic development and financial stability. This paper makes an empirical study of the impact of foreign exchange reserves on currency mismatch. The results of the study show that foreign exchange reserves have a significant and persistent effect on currency mismatch. Finally, based on the findings of the study and the current situation of China's foreign exchange reserves, this paper proposes some countermeasures.