Cutter head of subway tunnel shield tunneling machine

The utility model belongs to the technical field of shield tunneling machines, and particularly relates to a subway tunnel shield tunneling machine cutterhead which comprises a cutterhead box body andan alloy wear-resisting disc, the alloy wear-resisting disc is arranged in the cutterhead box body, the cutterhead is connected into the cutterhead box body through a rotating shaft, and an integrally-formed hob clamping groove is welded to the cutterhead. A hob clamping groove is formed in the cutter head body, a single-blade hob is clamped and fixed to the hob clamping groove, a rotating shaftconnector is formed in the center of the cutter head body, a wear-resisting grid is welded to the front end of the rotating shaft connector, the cutter head box body is connected with the rotating shaft in a sleeved mode through a butt joint opening A, and a bolt inserting opening a is fixed to the rotating shaft through a screw piece. A plurality of staggered single-edge hobs are arranged on thehob clamping grooves, the e