The utility model relates to a machine maintenance auxiliary equipment's technical field especially relates to a cold rolling inter -plant machine maintenance of factory is with repairing case, and its arm -tie height can conveniently be adjusted according to staff's needs, improves its adaptability, place chamber space utilization and improve it, improve its practicality, and when ground is smooth inadequately, can cushion jolting of moving as a whole to improve its result of use, including the box, get and put mouthful department's spiral shell and be equipped with and keep off the lid, still include pull rod, arm -tie, four group's supports and four group's universal wheels, draw -bar box draws together and inserts post and intubate, and the quick detach pipe clamp includes quick detachhandle, quickly detachable rod, handle seat and quick detach clamp, and the quickly detachable rod left end is provided with the nut, include still and place board, the four spiral shell rasp bar ofgroup, four group's screwed pipes and place the board down that four group's standing grooves are inside all to be provided with ball bearing and spacing, four group's supports all include bracing piece, supporting spring and four lower support rod of group, still include four group's mounts.