The utility model belongs to an air -cushion conveying device, including the trailer body, air pump and tractor -truck, the top is held in the palm and is dragged four air cushion automobile bodies of object to lie in the both sides limit lower extreme that is dragged the object respectively, and the other both sides limit of being dragged the object is moved by the tractor -truck and is drawn, is dragged to be equipped with on the object and supports its cushion that breaks away from ground, and the air cushion automobile body is followed and is inserted the side lower extreme that is dragged the object between the adjacent cushion. The air cushion body is the cuboid, and the both sides limit of the air cushion body is equipped with two sliders, and the lower terminal surface of the air cushion body be the plane, is equipped with the annular groove on the lower the peripheral edge of the end surface of the air cushion body, is equipped with the rubber elasticity piece in the annular groove, is equipped with the air cushion gas outlet on the air cushion body in the annular groove of rubber elasticity piece upper end, and the venthole is established at middle part that the air cushion was personally experienced sth. Part of the body, the air cushion air inlet that meets with main air tube outlet communicate with each other respectively air cushion gas outlet and venthole. The utility model discloses can carry large -scale work piece with the air cushion, have simple structure, efficient, labor - and time -saving uses in a flexible way, and the security performance is high, uses easy maintenance and effectual advantage.