In order to solve the problems in the prior art, the invention provides a power elastic load flexible adjustment method based on real-time electricity price. And a good and feasible method is providedfor formulating the real-time electricity price of the power supplier and adjusting the electric power elastic load of the demand side. The method comprises the following specific steps: establishinga demand response model of the electric power elastic load and an unsatisfactory model of user participation demand response; and on the basis, establishing a real-time electricity price model basedon the maximum profit of the power supplier and a minimum cost model of the user participating in the demand response, and finally obtaining a power flexible load demand response double-layer model based on the real-time electricity price; giving a real-time electricity price initial value in the solving process; based on the initial value, carrying out optimization solution on a cost minimum model of the lower-layer user participating in the demand response; solving to obtain a response strategy of a lower-layer user; substituting the strategy into a real-time electricity price model based onthe maximum profit of an upper-layer power supplier to obtain an optimal solution of the real-time electricity price, then substituting the optimal value of the real-time electricity price into a cost minimum model of a lower-layer user participating in demand response, and so on, and finally optimizing to obtain the optimal real-time electricity price and an optimal response strategy.