Shield tunneling machine cutterhead for subway construction

The utility model belongs to the technical field of shield tunneling machines, in particular to a shield tunneling machine cutterhead for subway construction, which comprises an annular fluted disc, six mud discharging holes are annularly arranged on the annular fluted disc, six cutterhead bodies are respectively arranged among the six mud discharging holes, and tooth grooves are arranged on the inner wall of the lower end of the annular fluted disc. By arranging the three mud cleaning fluted discs, in the rotary motion process of the cutter head of the shield tunneling machine, the fixed disc rotates, and the three mud cleaning fluted discs which are in meshing transmission connection with the fixed disc are driven to rotate on tooth grooves in the annular fluted disc through the action of outer teeth, so that the three mud cleaning fluted discs rotate around the fixed disc; the three mud cleaning fluted discs rotate so that the rigid mud brushes fixedly installed on the mud cleaning fluted discs can rotate