The main reasons for the paint gathering problem in the sharp corner of the bumper during electrostatic painting process,the quality impact and the common rework process are introduced.The solutions in the sharp corner are discussed and verified especially from the paint,robot painting path,electrostatic drainage of the solutions to the problem of paint gathering problem.The result showed that both paint and robot painting path had certain limitations,electrostatic drainage could balance the contradiction between the paint and the orange peel well,so that the paint gathering problem in the sharp corner was effectively solved.