From the perspective of industrial integration, we constructed a systematic integrated development evaluation system of culture and tourism industry, and used the improved entropy value method and the integration degree model to measure and analyze the systematic integrated development level of culture and tourism industry in Southwest mountainous provinces from 2012 to 2020. The results found that: (1) the comprehensive development level and integration degree of culture industry and tourism industry in southwest mountainous provinces generally show a fluctuating upward trend. At the current stage, the integrated development of culture and tourism industry system is in a stable stage, and the evolution state is intermediate coordination tourism industry lagging type. (2) The integration process of culture and tourism industry system in southwest mountainous provinces has experienced three stages of development, namely, “starting – stabilization – maturity”, showing “on the verge of dissonance – barely coordinated -Primary coordination-Intermediate coordination-Good coordination”. (3) The regional heterogeneity of the comprehensive development level and integration degree of the cultural and tourism industry system in the mountainous regions of Southwest China is obvious, and the integration pattern as a whole shows the dynamic evolution characteristics of “on the verge of dysfunctional dominance, intermediate coordination aggregation, and interlacing of middle-secondary and high-level coordination”. On this basis, the deep integration strategy of culture and tourism industry system is proposed.
