Electric slowing device for piston compressor

The utility model provides an electric barring device for a piston compressor, and the device is compact in structure, is safe and reliable, can effectively avoid damage caused by overloading, is suitable for an explosion-proof area, and improves the general safety of a unit. The device comprises a barring big gear, a barring motor, and a pedestal. The barring motor is supported on the pedestal. The device is characterized in that the barring motor is specifically an explosion-proof motor; the output end of the barring motor is connected with one end of an overrun clutch; the other end of the overrun clutch is connected with the input end of a worm gear reducer; the worm gear reducer is supported on the pedestal; an exposed output part of the worm gear reducer is specifically a sliding shaft; the front end of an exposed part of the sliding shaft is connected with a small gear through a flat key sleeve; the small gear can slide axially along a flat key; a side of the small gear is provided with poking rod; and an inner end part of the poking rod drives the small gear to slide axially.