Taking matching capacity of constructing photovoltaic power plant in a wind farm as research target could improve the utilization of land resources and increase the connection capacity of renewable energy. Indicators for reflecting generation benefit of wind power and photovoltaic power in the same field and relevant constraints are formulated by analyzing related factors about increasing photovoltaic power capacity. Calculation method and process of building solar power station are made. The proposed method contains operating constraints about wind and solar power generation characteristics and power delivery restriction. The method which has a strong engineering practicality considers effect of light intensity and shadow of facilities on PV arrays. Taking a real wind farm in Gansu province, making estimation by using Sunlight and PVsyst software can analyze relevant indicators and wind and PV power generation benefit. Rationality and practicability of the configuration proposed will be confirmed by simulation results.