The utility model relates to a balk cargo transport vechicle feed inlet door, including the feed inlet, a slide rail, door and cylinder, slide rail parallel arrangement is in the both sides of feed inlet, the slide rail divide into the first slide rail that the three -section level set up, second slide rail and third slide rail, the both sides of door are equipped with two pairs of assembly pulleys, every to the assembly pulley include preceding pulley with the back pulley, and equal slidable sets up on the slide rail, this door is when closed, the backward slip wheel lies in the front end of first slide rail, advancing slip round of front end that lies in the second slide rail, one side that the door is being close to preceding pulley is equipped with first draw -in groove, the door is equipped with the handrail at the up end of front end, the joint of handrail and cylinder passes through steel and is connected, the door is equipped with the second draw -in groove at the edge of its rear end. The beneficial effects of the utility model are that: practice thrift the manpower, simple structure sets up first draw -in groove and second draw -in groove and accomplishes locking, prevents that the door from toppling.