The utility model relates to a medium and heavy auttombilism room hydraulic pressure lifts uses rear fender support belongs to medium and heavy automobile parts technical field. The utility model discloses a hydraulic pressure lifts uses rear fender support includes bottom plate, reinforcing plate, support pipe, two rear fender fixed bolsters, mounting panel, installing support, blanking cover. The reinforcing plate welds perpendicularly on the bottom plate, and support pipe one end terminal surface welds on the bottom plate, one side arc surface welds on the reinforcing plate, the welding of the support pipe other end has the blanking cover, the support sealing of tube has this one end of blanking cover outside -in to weld installing support, rear fender fixed bolster, mounting panel, another rear fender fixed bolster in proper order. The utility model discloses simple structure has saved the assembly space, has reduced the dead weight, has realized driver's cabin lifting devices and rear fender's the integrated installation, and the design of reinforcing plate has increased its and connected to the frame's fastness, the utility model discloses it is simple to draw materials, wholly draws materials to steel sheet, steel pipe, effective reduce cost.