2018 is a turning year for China’s game industry，as well as a year of stable and optimized industrial environment reform. In 2018，China’s game industry has shown the characteristics of slowing down the growth rate of the industry，maintaining rapid growth of overseas game market，optimizing the structure of Chinese game users，and good performance of China’s secondary mobile game market. Among the Games independently developed by China，the original mobile game “Clash of Kings” has attracted a large number of players in the global mobile game market and achieved amazing results. It has become a model of international mobile game trade in China. This paper analyses the internal causes of the success of the “Clash of Kings”，including the financial support of the capital market，the business model of in-game purchasing，the insight into the market of mobile game demand and the company’s correct issuance strategies. The successful model of “Clash of Kings” has not only brought huge economic benefits to its developer，ELEX，but also brought confidence to other Chinese mobile game companies in international trade，and provided successful experience for the future development of mobile game in China.