Since the reform and opening up, China's SMEs in the process of market economy development gradually from domestic to overseas. Through a large number of domestic SMEs continue to open up overseas markets to participate in international trade, which promotes the rapid growth of China's economy, however SMEs are also facing a series of problems in the process of developing overseas markets. This paper mainly studies the necessity and Countermeasures of SMEs to explore overseas markets. Firstly, it analyzes the necessity of SMEs to explore overseas markets, and then analyzes the problems faced by SMEs in the process of developing overseas markets. Finally, combined with the actual situation, this paper puts forward some specific countermeasures to improve the development of overseas market of SMEs, in order to provide some reference for the process of SMEs to explore overseas markets.