Xianghai Nature Reserve is located in the semi-humid and semi-arid climate area in the west of Northeast China. It is a concentrated distribution area of saline-alkali marsh wetlands. In recent years, wetlands have been seriously degraded and biodiversity has declined under the influence of climate change and human activities. Based on the theory of Pressure-State-Response, this paper constructs an evaluation model of wetland restoration effect by using analytic hierarchy process, and develops an evaluation index system of wetland including three comprehensive indicators and 19 evaluation factors, to evaluate the restoration effect of the degraded wetland. The results showed that the vegetation coverage of Xianhe Island restoration demonstration area wetland increased by 45.83%, while the number and species of waterfowl increased by 40.41% and 61.54%, respectively. The comprehensive pollution index of water quality decreased by 8.70% and the salinity index of soil decreased by 8.82% in 2017 compared with that in 2015. Compared with the wetland evaluation value of 0.4481 in 2015, the wetland evaluation value of 2017 was 0.5537, and the restoration effect value increased by 23.57%. The marshes degradation situation in Xianghai has been significantly improved to achieve an ideal wetland restoration effect, which has certain significance for wetland restoration and management.