At present, more and more scholars are paying attention to the important factor of loneliness. There are relatively few domestic and foreign studies on the loneliness of international students. This paper mainly focuses on the loneliness of Chinese students studying in Thailand. By collecting and sorting out the relevant literature on loneliness of college students at home and abroad, the concept of loneliness, related research, measurement methods and current situation are analyzed and understood, and conclusions are drawn. And based on the existing results, it puts forward relevant suggestions for the mental health education of international students in major universities in Thailand.