As a typical representative of the suburban forest park in Chongqing, forest parks in the Four Mountain Area of Chongqing play an important role in meeting the needs of mountain city residents for vacation and recreation. The evaluation of recreation service capacity is an important measure to promote the development of park recreation and improve the quality of park recreation. Based on the characteristics of mountain cities and suburban forest parks, this paper constructs an evaluation system for the recreation service capacity of forest parks in the Four Mountain Area of Chongqing, which includes six standard levels and 22 evaluation indicators, namely, recreation accessibility, recreation environmental resources, recreation facility services, recreation perception, recreation activity services, and science, education and health services, by integrating network analysis, principal component analysis, and analytic hierarchy process, The recreation service capacity of 16 forest parks was evaluated. According to the results, the overall level of recreation service capacity of forest parks in the Four Mountain Area of Chongqing is average, and the recreation service capacity of all parks has not reached a good level. Based on the evaluation results, the recreation optimization strategy of Chongqing suburban forest parks is proposed from five aspects: ecological environment protection, mountain recreation activity system, recreation facilities and service quality, recreation publicity, and influence, so as to improve the level and quality of park recreation service, and further promote the construction and development of recreation functions of such parks.