Bridging machine middle support side sliding rail hole passing device

The utility model relates to an auxiliary device for a bridge machine, in particular to a piercing device for the middle cross-sliding track of a bridge machine. The utility model comprises a piercing device structure and a road wheel; the piercing device structure can be of box structure or of truss structure; at least one road wheel is arranged at each end of the piercing device structure. The utility model has the advantages of simple structure, easy fabrication, low cost and an easy practice. The utility model can greatly shorten shifting time, saves labor, saves time, and saves manpower with flexible and safe operation.