The present invention belongs to the field of railroad system technology, in the concrete, it relates to a fastener mounting method for urban railroad traffic yard line (containing column-type and wall-type inspection pit line) rail positioning connection. Said method is characterized by that on the surface of iron soleplate an iron seat is set so as to implement positioning and fixation of T-type bolt, at the same time the related structures of iron soleplate and rail gauge plate are optimized, its rail gauge regulation quantity is + 8mm-14mm, and its regulation level difference is 1mm. Said fastener can be conveniently mounted and reliably mounted.