Rear Dump Trailer's hydraulic tripod jacking system provides stable lifting force, the cargo box adopts wear-resistant high-strength steel plate, and the patented double-locking structure of the rear door prevents slag leakage when unloading. The maximum lifting angle reaches 60 degrees, and the dumping of 30 tons of sand and gravel can be completed within 12 seconds, which is especially suitable for construction sites, mines and other high-intensity operations. The anti-roll-over sensor and lifting synchronization limit device ensure safe operation, and the optional anti-freezing heating layer can be installed to cope with the transportation of concrete in cold areas.