Abstract: According to the facts of Guangdong province, establishing a coupling and coordinated evaluation index system for the economic, tourism and environmental systems of 21 prefecture-level cities in Guangdong province from 2008 to 2017. Calculating the weight of each index by using the entropy method , and evaluating the comprehensive development of each system. Analyzing the coupling coordination relationship of the economic-tourism-environment system by using the mathematical model and calculation method of coupling coordination degree. The results show that, 21 prefecture-level cities in Guangdong province have a high degree of economic-tourism-environment coupling, and there are no correspondence in spatial distribution between the coupling strength and the degree of coupling coordination; The economic-tourism-environment coordination degree in the Pearl River Delta region is relatively high, reaching a moderate and highly coordinated development level, and is an environment lagging type. The east-west wing and the northern Guangdong mountainous region's economic-tourism-environmental development is unbalanced, which is a lagging type of tourism and a lagging type of economy.

Key words: economy-tourism-environment, coupling and coordination, Guangdong province