[Objective] The leading functions of forest ecosystem services in Liaoning Province were evaluated, and their significance and feasibility as a nature-based solutions were analyzede in order to provide a theoretical basis for exploring nature-based solutions (NbS) suitable to conditions in China.[Methods] Based on the second-category survey data of forest resources in Liaoning Province in 2017, in accordance with the National Standard of the People's Republic of China "Specifications for assessment of forest ecosystem services" (GB/T38582-2020), the distributed measurement method was used to assess and evaluate the four leading service functions (i.e., green reservoir, green carbon pool, environmental oxygen bar pool, and biodiversity gene pool), and their contributions to solving social challenges were discussed.[Results] The monetary values of the four leading functions of the province were 1.71×10¹¹,8.24×10¹⁰,3.40×10¹⁰,and 9.69×10¹⁰ yuan/year, respectively. The distribution pattern of the services was mountainous areas in Eastern Liaoning>Northwestern Liaoning>coastal areas of central and Southern Liaoning. Dandong, Fushun, and Benxi had higher service functions, and Shenyang, Jinzhou, and Panjin cities had lower service functions.[Conclusion] In the context of global climate change and the increasingly urgent time to achieve the sustainable development goals, the connotation of NbS coincides with the contribution of ecosystem services to human well-being. The full use of various ecosystem services provided by forests can help solve problems related to climate change, biodiversity loss, and environmental degradation.