Important ecologically sensitive areas are extremely important to maintain regional ecological security. For railway construction projects that cross important ecologically sensitive areas, it is particularly necessary to implement ecological compensation in order to minimize the impact on important ecologically sensitive areas. This article introduces the ecological service function value loss accounting and ecological value loss accounting methods from the perspective of value, and puts forward the system introduction method, technology introduction method and compensation method introduction method of ecological compensation, combining the environmental impact assessment system and ecological compensation mechanism in order to improve the feasibility and operability of ecological compensation.