Fixing device for machining integrated chassis of heavy industry machinery

The utility model discloses a fixing device for processing an integrated chassis of heavy industry machinery, which comprises a workbench, an integrated chassis body and a fixing mechanism, the integrated chassis body is placed on the upper surface of the workbench, the fixing mechanism is installed between the workbench and the integrated chassis body, the fixing mechanism further fixes the integrated chassis body, and the integrated chassis body is fixed by the fixing mechanism. The fixing mechanism comprises transverse rails, a vertical frame, a sliding sleeve, a limiting bolt and a fixing assembly, the transverse rails are fixed to the front surface and the rear surface of the workbench, and the U-shaped vertical frame is vertically installed at the top of the workbench; the workbench, the integrated chassis body and the fixing mechanism are combined, the integrated chassis body placed on the workbench can be further supported and fixed, the placing stability of the integrated chassis body is improved, th