Abstract: Demand response is a key means of regulating the flexibility of the distribution network and optimizing the dispatch of demand-side resources. To fully utilize the adjustable of demand-side resources, a demand-side resource cluster optimization dispatch method based on load baseline reconstruction in the distribution network is proposed. A fuzzy set is used to construct an model for the output of new energy, and a load baseline model considering the prediction error of new energy is reconstructed. The adjustable power domain of the adjustable load resource cluster is quantified based the idea of time-period decoupling dimensionality reduction, and an intraday optimization model for the demand-side resource cluster participating in the baseline-type response is proposed. Through the example, it can be seen that the proposed method can not only improve the new energy consumption capacity, but also improve the economic benefits of the power grid.