Taking Wafangdian county in Liaoning province as the research unit, on the basis of the evaluation of the four typical ecosystem services, including food supply, NPP, water yield and soil conservation in 2000 and 2014, OWA model was introduced to simulate the priority conversation areas of ecosystem services in the study area in 2014 as the ecological source. The MCR model was used to identify the ecological corridor and buffer zone, and the ecological security pattern of the study area was constructed. The results show that: (1) From 2000 to 2014, the spatial and temporal changes of ecosystem services in Wafangdian were significant. Except for water yield, other ecosystem services had been enhanced. (2) Considering the efficiency of ecosystem services protection (Ei>1) and trade-off degree (0.68), the priority conservation areas under scenario 5 were selected as the ecological source of Wafangdian. (3) The ecological source area of Wafangdian was 564.92 km2, which is distributed throughout the region; the total length of ecological corridors was 642.62 km, the first level corridors (220.76 km) ran through the north and south of the study area, and the secondary corridors (421.86 km) connected the dispersed ecological sources with net-like distribution. The results can provide decisive supports for sustainable ecosystem management and land use optimization in Wafangdian.