The design to provide mid-voltage dynamic voltage restorer(DVR) with the function of series harmonic compensation to simplify the main circuit structure and improve the efficiency of DVR is proposed in this paper. Firstly, the relevance and differences of main circuit structure between DVR with series active power filter(SAPF) are compared. Based on the design principles of the main circuit parameters of DVR and SAPF, a design method of LC filter that can achieve both functions is proposed. PR control method is adopted to achieve dynamic voltage restorer and PI control method is used to achieve series active power filter. Bode diagrams are used to analyze the characteristics of transfer functions of the two work state. Finally, the physics experiments show the feasibility and effectiveness of the proposed method.