A fast power service restoration method for distribution network with DG is proposed in this paper. Firstly, a network simplification and multi-layer description method is presented. Secondly, on the basis of the network simplification and description, the studied restoration problem is analyzed equivalently in an equivalent calculating network and it is turned into a knapsack problem whose mathematical model is built as a nonlinear quadratic integer programming model. Thirdly, an integrated optimal restoration strategy is proposed and its corresponding algorithm is implemented in this paper. Finally, the effectiveness and rapidity of the proposed method has been verified by several cases studies in a modified IEEE 33 bus distribution network with DG based on MATLAB simulation.