The utility model discloses an uncoupling device between track skip and dust catcher car, including being fixed in the bearing frame and the roof pressure mechanism of being fixed in track one side on the dust catcher frame, be equipped with the pivot on the bearing frame, be equipped with the movable hook in the pivot, the railcar is connected with fixed horizontal pole, is equipped with the hook mouth who colludes on fixed horizontal pole on the movable hook, and the expansion end of movable hook is equipped with the sloping block, and the sloping block supports in roof pressure mechanism. The utility model discloses the movable hook that sets up colludes when the track skip is connected with the dust catcher car on fixed horizontal pole, during track skip and the orbiting of dust catcher car to department of roof pressure mechanism, sloping block roof pressure mechanism, the sloping block drives the movable hook and upwards rotates, thereby hook mouth breaks away from fixed horizontal pole realizes automatically unhook, when the track skip moves towards the dust catcher car, the track skip promotes the dust catcher car, sloping block drive movable hook rotates downwards under the action of gravity, thereby hook mouth colludes and realizes the automatic connection in fixed horizontal pole, with no need of human participation, the manpower is also saved, promote work efficiency.