Abstract: On the basis of analyzing the traditional distribution network current protection system, this article deeply analyzes the impact of distributed power source access on the distribution network current protection system. A solution for current protection configuration and parameter tuning in distribution networks with distributed power sources is proposed to address issues such as reduced sensitivity of current protection or misoperation and refusal of protection systems caused by the integration of distributed power sources. Taking a 10 kV regional distribution network with distributed power sources as an example, the potential misoperation of protection systems caused by the integration of distributed power sources is analyzed, and the effectiveness of the proposed solution is verified, providing meaningful reference for the tuning of protection systems in distribution networks with distributed power sources.