Abstract: The success rate of distribution automation self-healing affects the reliability of power supply. In view of the low success rate of distribution network automation self-healing, an in-depth investigation and research is carried out. Through analysis, the main crux affecting the self-healing of distribution network automation is found out. It is mainly caused by the weak signal of the communication module on the existing switchgear and the failure to eliminate the defect of the distribution network on time. Then the remedy was applied to the case and a practical rectification plan was formulated. First, carry out closed-loop management for module upgrading; Secondly, the regular alarm program of distribution equipment defects is developed at the same time, which shortens the processing time of distribution equipment defects. Through this effective rectification, the distribution network automation has stepped to a new level. The selfhealing rate of distribution network automation has been greatly improved.