The invention provides a linearized power flow-based network reconstruction method for a power distribution network and belongs to the technical field of operation control of power systems. The methodcomprises the steps of firstly building a network reconstruction model, formed by an objective function and constraint conditions, of the power distribution network; transforming the objective function and the constraint conditions separately and transforming an original model into a mixed integer quadratic programming model; and solving the transformed model to obtain open and closed state variables of various branches and carrying out corresponding switching actions according to the solving result to achieve network reconstruction. The linearized power flow-based network reconstruction method is high in computation speed and good in convergence and is suitable for being applied to the scenes of real-time network reconstruction of the power distribution network.