Abstract: the goal of carbon neutralization puts forward higher requirements for power grid material management, and the evaluation and management of green suppliers of power grid materials has become an important starting point for the optimization of material management and the sustainable development of power grid enterprises. This paper analyzes the accurate portrayal method of green suppliers of power grid materials under the background of double carbon, designs the evaluation index system of green suppliers of power grid materials based on OSM model, constructs the fuzzy TOPSIS Model of green supplier evaluation of power grid materials, verifies the rationality of the evaluation model, and puts forward strategic suggestions to strengthen the management of green suppliers of power grid enterprises, which provides a reference for the development of green supplier management of power grid materials under the background of carbon neutralization.