Self-locking traction device

The utility model provides a self-locking traction device. The self-locking traction device comprises a translation trolley, a clamping and disengaging mechanism and a traction mechanism, wherein the clamping and disengaging mechanism and the traction mechanism are arranged on the translation trolley; the clamping and disengaging mechanism is used for clamping and disengaging the steel wire rope; the traction mechanism is connected with an object to be dragged; the translation trolley comprises a frame body and rollers, and the frame body moves in a guide rail through the rollers; the idler wheels are arranged on the edge portions of the frame, installation shafts are arranged on the frame, and the idler wheels are installed on the frame through the installation shafts. The self-locking traction device has the advantages that the two clamping blocks which are provided with the sliding grooves and can be opened and closed are arranged on the self-locking traction device, the sliding grooves with the taper can