Carriage protection device for railway freight car

The invention belongs to the technical field of tarpaulin covering, and discloses a carriage protection device for railway freight cars, which comprises a train carriage and a placing cylinder, tarpaulin is wound in the placing cylinder, the tarpaulin is movably clamped with the bottom of an integration plate through a supporting block and a limiting block, grooves are formed in both the front and back surfaces of the train carriage, and the tarpaulin is arranged in the groove. A fixed frame is fixedly installed on the left side of the top of the train carriage, a movable frame is movably installed on the top of the train carriage, and the top of the inner wall of the movable frame is movably connected with an integration plate through a hydraulic rod. According to the tarpaulin storage device, tarpaulin is stored in cooperation with a rotating motor on the front face of a containing cylinder, in the tarpaulin storage process, the containing cylinder is driven by a moving frame clamped to the top of a train c