Because of its simplicity, economy and reliability, current protection is widely used in distribution network of 35 kV and below. However, due to the small short-circuit current of the inverter-interfaced distributed generation (IIDG), current protection on the IIDG side fails to operate correctly and the distance protection also faces great challenges. The fault characteristics of the IIDG and its impact on the distance protection is analyzed in this paper. Based on this, a protection network configuration method based on the combination of delay distance protection and current protection is proposed. The method is simple and easy to implement, and is able to endure fault resistance and noise. A distribution network model with IIDG is built in PSCAD/EMTDC, and the simulation results verify fault characteristics and protection configuration method.