Tube drawing lock catch

The utility model relates to the technical field of pipeline construction, in particular to a pipe drawing lock catch which comprises a steel strand extrusion head, a perforated gasket, a self-locking anchor head, a steel strand and a stretching device, the steel strand extrusion head, the perforated gasket and the self-locking anchor head are sequentially installed on the steel strand, and the steel strand extrusion head, the perforated gasket and the self-locking anchor head are all installed in an inner cavity of an underground pipeline; according to the arranged pipe pulling lock catch, a stretching device is started, the stretching device pulls a steel strand, the end of a steel strand extrusion head abuts against the side wall of a punching gasket, a punching coil is driven to move, the punching coil abuts against a first diagonal plane of a self-locking anchor head, the punching coil drives the self-locking anchor head to deflect, and the self-locking anchor head is pulled out. The edges of the first d