Abstract: This paper taked 12 provinces in the western region of China as the research object, established the coupling characteristic index system from two aspects of population urbanization and land urbanization, and used entropy method and coupling coordination degree model to visually study the coupling coordination relationship between population urbanization and land urbanization in western region of China from 2013 to 2018. The results show that the overall development trend of urbanization level in the western region of China is good, and the degree of interdependence between population and land is high. The coupling coordination degree is increasing year by year, and the coordinated development trend of population urbanization and land urbanization is good; From the perspective of time series, the population urbanization composite index is always lower than the land urbanization composite index, which shows that the development of population urbanization lags behind, and most provinces, cities （autonomous regions） are in the lag state of population urbanization, and there is the risk of empty city; From the perspective of spatial pattern, the western region of China presents a spatial pattern based on the difference of economic development level, and the types of coordinated development are differentiated according to provinces; By 2018, most provinces, cities （autonomous regions） in western region of China are in the intermediate coordination state, and some provinces, cities （autonomous regions） are in the primary coordination state, and all of them have achieved the promotion of coordinated development type. The coordinated development of population urbanization and land urbanization is in good condition, and the overall level of urbanization in western region of China has been improved.

Key words: population urbanization, land urbanization, coupling coordination, western region of China