Pipe jacking machine with drill bit convenient to replace

The utility model relates to the technical field of pipe jacking machines, in particular to a pipe jacking machine with a drill bit convenient to replace, and aims at achieving the pipe jacking machine with a cutter head convenient to replace and improving the convenience of maintenance and replacement of the cutter head. A pipe jacking machine with a drill bit convenient to replace comprises a hydraulic propelling device, a soil conveying device, a grouting system, measuring equipment, ground hoisting equipment and an electrical system, a rear cylinder is arranged on the front side of the hydraulic propelling device, and a front cylinder is arranged on the front side of the rear cylinder; the rotary excavating device comprises a driving module, a connecting disc and a cutter disc, a cutter is installed on the front side of the cutter disc, and the connecting disc is of an annular structure and is movably connected with the front cylinder through a sealing bearing. By arranging the connecting disc rotating re