The invention discloses a capacitor cover plate which is easy to assemble and disassemble, include a housing, Sliding device and fixing device, At that top of the house, an insulating seat is symmetrically arranged, the insulating seat is fixedly connected with the terminal, A lath hole is arranged inside that house, the strip hole is provided with a sliding device, 2 slide grooves are symmetrically arrange under that sliding device, and the sliding grooves are fixedly connected with the bottom of the shell, the sliding grooves are slidably connected with the sliding blocks, the left and rightsides of the lower ends of the sliding blocks are fixedly connected with clips, and the clips are slidably connected with the lead-out wires; when the cover plate is used, the proper size is adjustedthrough the stretching of the sliding device, so that the cover plate and the capacitor are more consistent; The pressure block in the fixing device is subjected to the pressure of the capacitor shell, and the fixing device is designed so that the cover plate is more easily attached to the capacitor shell, and the mounting and taking out of the cover plate are convenient. The clamps in the coverplate clamp both sides of the lead wire, so as to prevent the lead wire from loosening in the mounting and use process and cause the capacitor failure.