Abstract: In recent years, the pilot work of low-voltage reliability was vigorously promoted, and the way of reliability statistics have been further in line with international standards. Based on statistical principles, this paper establishes the application scenario of correlation analysis of power supply reliability index of medium and low voltage customers in actual distribution network operation and management, provides a tool for judging the accuracy of low-voltage reliability statistics, and also provides a useful exploration for our country’s continuous promotion of low-voltage reliability statistics.