At present, the contradiction between seasonal and periodic power supply and demand is increasingly prominent. The orderly use of electricity by means of avoiding peak and shifting peak can alleviate the contradiction between power supply and demand to a certain extent and delay the construction sequence of transmission and distribution facilities. First of all, this paper overcomes the defect that single constant weight can't react sensitively to abnormal indicators, and proposes to combine information entropy with grey correlation degree, and introduce the method of variable weight to apply to the comprehensive evaluation of the potential of users to participate in orderly power consumption, so as to determine the priority of enterprises to participate in orderly power consumption. Then, aiming at the profit loss of power grid companies caused by the traditional artificial arrangement of orderly power consumption scheme, an auxiliary decision-making method of orderly power consumption based on MATLAB is proposed to simulate the peak avoidance and peak staggering of users. Taking the operation scheme of Changsha Heishi line in summer in 2020 as an example, the results show that the proposed method based on information entropy grey correlation variable weight can alleviate the peak load regulation pressure of power grid in peak period, and has certain economic and practical engineering value.