Abstract: The important of ecosystem service and eco-environmental sensitivity of ecological forest in Chun’an, Zhejiang province were analyzed by evaluation. The results showed that ecosystem service importance of ecological forest in Chun’an was great, and the proportion of highly important ecological forest was the largest, accounting for 41.93% of the total area of ecological forest in Chun’an. The proportion of relatively important, medium important and extremely important was similar, 17.92%, 19.53% and 18.27%, respectively. The general importance forest accounted for only 2.35%. The overall eco-environmental sensitivity of ecological forest in Chun’an was well, and the highly and moderately sensitive accounted for 37.28% and 31.05% of the total one of the county. The proportion of relatively sensitive and extremely sensitive was 17.05% and 11.57%, respectively. The total area of ecological source of ecological forest in Chun’an was 50 160.04 ha, accounting for 30.13% of the total one. The fragments of ecological source mainly distributed in the northwest, northeast and southeast of Qiandao Lake, forming an ecological barrier around Qiandao Lake. Suggestions were put forwarded such as the safety of ecological source and no any exploitation.