Train carriage auxiliary device facilitating feeding and discharging

The train carriage auxiliary device comprises a bottom plate, a first hydraulic rod and a second hydraulic rod are fixedly connected to the left side and the right side of the top of the bottom plate respectively, a sliding assembly is arranged at the top end of the first hydraulic rod, and a supporting frame is hinged to the top end of the second hydraulic rod. A conveying mechanism is arranged between the front face and the back face of the inner wall of the supporting frame, and a collecting box is fixedly connected to the bottom of the supporting frame. By arranging the negative pressure assembly, air in the collecting box can be sucked out, so that the interior of the collecting box is in a negative pressure state, dust generated in the article conveying process is sucked into the collecting pipe through the dust suction nozzle, and the dust is collected through the collecting pipe and then conveyed into the collecting box through the first dust suction pipe; dust generated in the article conveying proce