As distributed resources such as distributed power sources, flexible loads and distribution stations are connected to the distribution network on a large scale, the traditional distribution network is gradually transforming into an active distribution network. However, due to the uncertainty and complexity of distributed resources, power flow congestion occurs in the distribution network during operation. Therefore, this paper proposes a distribution network distributed method based on target cascade analysis. Congestion management method. Firstly, a double-layer model of the distribution network is constructed. The upper-layer model solves the problem of network loss minimization during the operation of the distribution network, and the lower-level model solves the problem of minimizing the adjustment amount in the distribution station area. The problem of minimizing the adjustment amount of the power station area; secondly, the target cascade analysis algorithm is used to couple the optimal power flow model of the distribution network and the distribution station area model to obtain a congestion management plan. Finally, the improved IEEE33 distribution network simulation example was used to verify the feasibility and effectiveness of the distribution network congestion management of this model.