Abstract: The evaluation index system is constructed from the two aspects of low-carbon green development and ecotourism economy. Based on the determination of measurement methods， a coordinated development model is established. Taking C province as an example， the coordinated development model is used to analyze the process of ecotourism economy and low-carbon green development. The results show that although the low-carbon green development has lagged behind the economic growth of ecotourism since 2016， they have been actively coupled， and reached the highest coupling degree of 0.747 9 in 2019. It shows that under the concept of low-carbon development， tourism development no longer only pays attention to economic benefits， but combines economic benefits with environmental benefits to realize environmental friendly economic development.

Key words: low-carbon green, ecotourism, eco-friendly, sustainable development, C province