Abstract: Green development efficiency is an important reference to evaluate the quality of green development. Based on the static and dynamic perspectives respectively, this paper measures the green development efficiency of Chengdu-Chongqing Twin City Economic Circle from 2007 to 2019 using super efficiency SBM model and Malmquist index，analyzes its temporal and spatial evolution characteristics and influencing factors，and predicts its green development efficiency for the 14th Five-Year Plan period using Winter linear and seasonal exponential smoothing method. The results show that:(1)The green development efficiency of Chengdu-Chongqing Twin City Economic Circle is a higher level of 0.882，and it presents the time sequence characteristics of the transformation from“higher level and larger gap”to“higher level and smaller gap”，but it is still lower than the average level of Yangtze River Delta Urban Agglomerations;The average value of Malmquist is 1.278, indicating a high growth of the green development efficiency, and the overall growth is faster than the Yangtze River Delta Urban Agglomerations;（2）The Chengdu-Chongqing Twin City Economic Circle has gradually formed a distribution pattern with“Ya'an Ziyang Chongqing”and“Chengdu Suining Guang'an”as double parallel principal axis areas with a high efficiency green development,and“Yibin Luzhou”and“Mianyang Dazhou”as two wings with a low efficiency green development;（3）For the improvement of green development efficiency of the Chengdu-Chongqing Twin City Economic Circle, the contribution rate of technological progress > the contribution rate of technical efficiency > the contribution rate of scale efficiency, and according to this, it can be divided into comprehensive promotion development type, special leading development type and single hindering development type.