Evaluation of wetland ecosystem services and its spatial distribution is of great significance for wetland conservation, management and sustainable utilization. There are characteristics of population agglomeration, sensitive and fragile ecological environment, disturbed by human activities, and great demand for wetlands in plateau cities. However, due to the constraints of climate and geographical conditions, some wetland ecosystem services are very limited. Taking the Huangshui National Wetland Park (HNWP) as a case study, the current paper constructed an ecosystem service evaluation system that is suitable for plateau city wetland. Combined field investigation data with the analysis of experimental data, we analyzed the wetland value and its radiation pattern characteristics by using function value methods and the break-point model. The results showed that: (1) the total value of the 15 ecosystem services from HNWP was 6.18×10⁸ Yuan in 2020. Four types of the ecosystem services were sorted through large to small as cultural services, regulation services, support services and supply services. The value of each ecosystem service from high to low was humidification > recreation services > heritage value > existence value > surface water storage > river sediment transport > culture and education research > temperature regulation > biodiversity protection > ecological and environmental water use > air filtration> oxygen release > carbon fixation > sewage treatment > harvestable plant products. (2) In the five wetland parks of the HNWP, the value of the Huangshui River was the highest, followed by the Beichuan wetland, the Haihu wetland, the Huoshaogou wetland and the Ninghu wetland. (3) The order for radiation pattern from large to small was Ninghu Wetland, Beichuan Wetland, Huangshui River, the Haihu Wetland and the Huoshaogou Wetland. A core area and five sub-core areas of the ecosystem services were formed after the overlap of the wetland service radiation pattern. (4) There was spatial spillover of ecosystem services in the HNWP. The ecosystem services from Huangshui River overflow to the surrounding wetland parks, and there were mutual spillover and superposition of ecosystem services among Haihu Wetland, Beichuan Wetland, Ninghu Wetland and Huoshaogou wetland. Overall, the results of this study focused on the ecosystem services of urban wetlands, clarified the boundary of ecosystem services on the basis of the evaluation, and determined the spillover and superposition of ecosystem service between different wetlands in the same region. The information may support the sustainable utilization of plateau urban wetlands, which provides a reference for implementing ecological civilization construction.