Abstract: Honghe Mengzi Power Supply Bureau has 84 10kV public lines, totaling 1,941 kilometers. 10kV distribution lines have been widely used in urban and rural areas, the main reason is that the distribution lines are long, many points, wide areas and other advantages. However, in the process of practical application, the number of distribution line poles and towers is large, and the number of pole plates is large, which is difficult to maintain. 10kV line pole plate is often open, after a long time of sun and rain gradually aging, the pole plate handwriting is not clear, which brings difficulties to operation and maintenance. Starting from the shortcomings of overhead line pole plates in 10kV distribution network, this paper focuses on analyzing the causes of aging pole plates, and then proposes to develop targeted preventive measures, aiming at providing theoretical reference for improving personal safety and cost control of distribution network in Mengzi area.