Abstract: Under the background of carbon neutralization goal, based on the research horizon of system theory, the synergetic Haken Model is used to measure the synergy between economic development and ecological environment of provinces along the Silk Road Economic Belt from 2011 to 2020, and further take the realization of carbon neutralization goal as the constraint condition, the logistic evolution equation model is used to explore the synergistic evolution trend of the two. The results show that during the study period, the synergy between economic development and ecological environment in 9 provinces along the Silk Road Economic Belt is generally low. The average synergy between economic development and ecological environment in Xinjiang and Shaanxi is greater than 0.5, and the average synergy between economic development and ecological environment in the other 7 provinces is less than 0.5; Further, with the goal of carbon neutralization, adding the constraint of institutional environment, and using logistic equation to predict the collaborative evolution trend of the two, it is found that the synergy between economic development and ecological environment in 9 provinces and regions along the Silk Road Economic Belt has been significantly improved. This shows that the order parameter driving the synergy between economic development and ecological environment of provinces along the Silk Road Economic Belt has changed from comparative advantage to institutional environment. Silk Road Economic Belt one belt, one road initiative, and the new development pattern of China are the important engines for the economic development and ecological environment of the Silk Road Economic Belt.

Key words: carbon neutral orientation, provinces along the silk road economic belt, economic development, ecological environment, collaborative evolution