Cutter head for shield tunneling machine

The utility model relates to the technical field of shield tunneling machines, in particular to a cutterhead for a shield tunneling machine, which comprises a cutterhead body, hobs are arranged at the front end of the cutterhead body, a slag discharge groove is arranged in the center of the front end of the cutterhead body, a crushing mechanism is arranged in the slag discharge groove, and the hobs are annularly distributed at equal intervals by taking the slag discharge groove as a circle center. A scraper is arranged between every two adjacent hobs, a supporting plate is connected to the inner sides of the scrapers, a rectangular opening communicated with the two sides of the supporting plate is formed in the supporting plate, a toothed column is arranged in the middle of the rectangular opening, a bidirectional motor is connected to one side of the toothed column, toothed plates are arranged on the two sides of the supporting plate, and racks are arranged on the inner sides of the toothed plates. The tooth