In the future, high proportion of renewable energy will be connected to the power system, wind and photovoltaic are developing in a high proportion, and flexible resources such as energy storage and interruptible load play an important role in peak load regulation. In this paper, a planning method for wind power and photovoltaic absorption considering flexible resources is proposed. Under the limitation of power development capacity, combining with the experience of experts, we give priority to the development of peak-regulating power supply, energy storage, interruptible load and other flexible resources, maximize the adjustable capacity of the system, and consider reasonable power abandoning space to improve the capacity of accepting new energy. On the balance method, the period of balance check is selected based on the regional load, wind and photovoltaic characteristics. Based on the historical data, the wind and photovoltaic output rate in the peak shaving equilibrium period is judged, and the wind and photovoltaic abandonment rate is calculated respectively by integrating the typical daily power abandonment. This method considers the adequacy of system capacity and the capacity of new energy absorption comprehensively, and constructs a comprehensive planning method of wind and solar energy absorption based on the balance method. It also considers certain power abandonment to promote the development of new energy. Finally, an example of 2025 and 2030 power supply planning for a provincial power grid in Northeast China is given to verify the effectiveness of the above model and algorithm.