In order to reduce the platform screen door equipment damage, decrease underground pipe and reinforced bar stray current corrosion, and improve the safety coefficient of the passengers on the train, from the analysis of platform screen door insulation, problem of passengers getting on and off train safety and platform screen door device spark phenomenon were settled, and by improving insulation resistance of rail to the earth, stray current was decreased and underground pipe and reinforced bar corrosion was reduced. Status and existing problems of platform screen door insulation were expounded, and corresponding measures and solutions were put forward.