Cutter head and tunnel boring machine

The utility model provides a cutterhead and a tunnel boring machine. The cutterhead is applied to the tunnel boring machine and comprises a first cutterhead body, a second cutterhead body and a first connecting piece, and the second cutterhead body is annular and coaxially arranged outside the first cutterhead body in a sleeving mode; a plurality of first connecting structures are arranged on the circumferential outer side of the first cutterhead at intervals, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumferential side edge of the second cutterhead, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutterhead and the second cutterhead can be relatively fixed in the circumferential direction; the first connecting structure and the second connecting structure are detachably connected through a first connecting piece, so that the second cutter head and the first cutter