As people pay more and more attention to the environmental noise problem of substations, it is an important environmental protection work to carry out noise control of over-subjected substation. According to the lack of strict scientific argumentation, poor engineering control effect and high project cost, the paper proposes an accurate control model for outdoor substation noise. Taking the actual substation as an example, with the development of the substation environmental noise analysis system software SENCS, through six steps of data collection, model verification, pre-treatment analysis, optimization of governance plan and analysis of management effects, it is proposed the model of precise control of outdoor substation, which can play an important guiding role in outdoor substation noise control and new substation planning and design..