Few Chinese people know about the Finnish explorer Mannerheim’s expedition in the Western Regions, an important expedition conducted by a foreign explorer in Chinathat began to receive research attention at the end of the 20 th century. With the translation and publication of Mannerheim’s works and related documents in the 21 st century, Chinese scholars have gradually investigated the explorer Mannerheim and his expedition in the Western Regions. The International Conference on Mannerheim’s Expedition in Xinjiang has greatly promoted this research. This research started earlier in foreign countries than in China and Finnish scholars have studied Mannerheim’s expedition quite thoroughly. Because the author cannot obtain much of the foreign research results due to limited conditions,this paper mainly introduces the research on Mannerheim conducted in China.