The full trailer is a heavy-duty transport vehicle with independent load-bearing capacity and a drawbar connection. It features a high-strength steel structure box body, a multi-axle travel system, and a hydraulic self-unloading mechanism. It can be flexibly matched with various tractor units and is widely applicable to bulk material transfer operations in mining, engineering, and logistics industries. The vehicle's reinforced box body design provides outstanding features such as high load-bearing capacity, high unloading efficiency, and good site adaptability.