The construction of minority characteristic tourist towns and the coordinated development of the tourism industry is an important way for ethnic minority tourist towns to improve their economic, social, resource, and environmental development levels. This article analyzed the mechanism of the coupling and coordination relationship between the construction system of ethnic minority characteristic tourist towns and the tourism industry system from three aspects: economy, society, and resource environment. Taking Longji Town as the research object, we constructed an index system for the coupling and coordinated development of the two systems. By using the coupling coordination degree model to analyze the coordinated development of Longji Town construction and tourism industry from 2013 to 2018, we found that the two systems generally show an upward development trend, and the degree of coupling coordination has changed from barely coupling coordination to good coupling coordination. The construction level of Longji Town and the degree of coupling coordination of the tourism industry system were manifested as the lagging development of the town construction level and the lagging tourism industry development alternately. The leading role of the development of Longji’s tourism industry in the construction of small towns was fluctuating and lacked stability. According to the research results, a policy reference for the sustainable development path of minority characteristic tourist towns was proposed.