Abstract: In order to ensure the supply of materials in the construction of distribution network and reduce the risk of material supply, in this paper, from the view of supply chain, the risk identification is extended and expanded from the demand side to the front end of suppliers and the external environment, and a risk assessment model of distribution network material supply is constructed by using analytic hierarchy process method.The model integrates the massive data of power system and external information such as transportation, meteorology and credit investigation, and selects four factors: material demand, supplier situation, material adjustability and transportation capacity as the first-class indicators.The supplier situation includes three second-level indicators: supplier resumption, quality sampling/delayed delivery and credit evaluation.The model realizes the quantitative evaluation and classification of material supply risk of state grid projects.In practice, this model improves the information transparency of the material supply chain by coordinating the allocation of high-risk materials, effectively prevent the supplier risk or natural disasters and other emergencies on the construction of the negative impact.At last, this paper puts forward a further improvement scheme for the risk index model of power material supply.