Abstract: Scientific evaluation of the environmental effects of water environmental control projects is of great significance for the formulation and optimization of river and lake control schemes and the promotion of scientific pollution control. Xinfeng River Basin is an important water security area in the sub-center of Beijing, and the water pollution problem (black and smelly) was prominent. In order to scientifically evaluate the effects of water environment comprehensive control projects in the Xinfeng River, a technical method of engineering environmental effects assessment were established by coupling model of water-land integration based on SWMM and EFDC. The quantitative simulation evaluation of the environmental effects was carried out for the projects of watershed pollution interception and treatment, wetland construction, water diversion and replenishment, and initial rain regulation and storage. The results showed that the main factor affecting the effect of projects included pollution interception rate, wetland treatment standard, water quality and storage capacity of primary rain. Comprehensive projects and individual projects had made positive contributions to the improvement of water quality. In terms of average reduction rate of water quality concentration, the the project contribution was in the sequence of comprehensive projects (69.8%) > sewage interception (63.1%) > water diversion (51.7%) > wetland construction (50.5%) > initial rain storage (3.8%). In terms of average compliance rate, the sequence was comprehensive projects (96.7%) > sewage interception (85.2%) > wetland construction (32.6%) > water diversion (32.5%) > initial rain storage (0.9%). In terms of load reduction, the sequence was sewage interception (512.4 t/a) > comprehensive projects (319.3 t/a) > wetland construction (89.9 t/a) > initial rain storage (21.9 t/a)> water diversion (-62.6 t/a). The water-land integrated coupling model based on SWMM and EFDC had good applicability in the evaluation of water environment treatment engineering effect, and had certain guiding significance for water pollution control of urban rivers.