The utility model provides a loading-unloading conveying vehicle aiming at large-scale and heavy duty powder compacting, which comprises two fixing guiding wheels and a vehicle frame of a universal wheel capable of braking, wherein the two fixing guiding wheels and the vehicle frame of a universal wheel capable of braking are respectively fixed to the bottom of the front and the back ends of the loading-unloading conveying vehicle, a pedal type hydraulic mechanism which is fixed to the middle of the upper part of the back end of the vehicle frame, a guiding mechanism which is fixed to both sides of the upper part of the back end of the vehicle frame, a load bearing lifting platform which is arranged on the vehicle frame and a chain wheel pair which is connected with the load bearing lifting platform and the hydraulic mechanism. The utility model is characterized in that the load bearing surface of the load bearing lifting platform is composed of a plurality of rolling wheels which are vertical with the direction of movement of the loading-unloading conveying vehicle and are arranged in a parallel mode; both sides of the back end of the load bearing lifting platform are provided with guide pulley sets matched with a guiding rod which is arranged on the guiding mechanism and is vertical with the plane of the vehicle frame, wherein the guide pulley sets move up and down in parallel with the vehicle frame and are arranged in a symmetrical mode; a lifting device is composed of the pedal type hydraulic mechanism and the chain wheel pair. The utility model solves the problem of dropping edges and angles in the process of loading, unloading and conveying, and further eliminates hidden trouble of safety. The utility model has the advantage of low labor intensity.