Variable-diameter composite cutter head and rescue shield tunneling machine

The utility model discloses a variable-diameter composite cutterhead and a rescue shield tunneling machine, which comprise a cutterhead, a spiral cylinder fixedly connected with the cutterhead, an outer sleeve arranged outside the spiral cylinder, and an emitter forming control signal wireless transmission between the emitter and a receiver, and the cutterhead is the variable-diameter composite cutterhead. The cutter head comprises a cutter head body and a hob assembly installed on the cutter head body, the outline of the outermost side of the end face of the cutter head body extends along the axis of the cutter head body, and then a space formed in the outline of the outermost side is a tool retracting space. The hobbing cutter assembly comprises at least one cutter box rotationally connected with the cutter head body, a hobbing cutter installed in the cutter box and a driving assembly used for driving the cutter box to swing so that the position of the hobbing cutter can be adjusted inside and outside the c