Cutter head spray head of shield tunneling machine

The utility model discloses a cutterhead sprayer of a shield tunneling machine. The cutterhead sprayer of the shield tunneling machine aims to solve the technical problem that in the prior art, soil on the outer side of a cutterhead of the shield tunneling machine cannot be effectively sprayed off. The cutterhead spray head comprises a spray head pipe, an air inlet pipe is fixedly installed at the bottom end of the nozzle pipe, an air distribution assembly is arranged on the inner side of the nozzle pipe, a fixed guide piece is fixedly installed at the upper end of the nozzle pipe, a fixed clamping block is fixedly installed on the outer side of the nozzle pipe, a sleeve is arranged on the outer side of the fixed clamping block, a clamping groove is formed in the inner side of the sleeve, and the clamping groove is connected with the fixed clamping block in a clamped mode. A threaded connector is arranged at the bottom end of the sleeve and is in threaded connection with the sleeve, and an air injection assem