The invention provides a sinking rotary shaft boring machine, and relates to the technical field of shaft boring machine engineering machinery. The machine comprises a boring mechanism, a power lifting mechanism arranged on the ground for lifting the boring mechanism, a slurry separation mechanism for discharging and processing used for lifting, discharging and treating mud slurry mud generated after the boring mechanism breaks earth in a shaft and an operation control system for controlling the operation of each of the above mechanisms, the boring mechanism includes a boring frame, a drill arm, a main drive device for driving the rotation of the drill arm, a drilling tool and auxiliary drive devices for driving the drilling tool to rotate, and the lower portion of the main drive device isconnected with the middle of the drill arm; at least two auxiliary drive devices are mounted on the drill arm, and the lower portions of each auxiliary drive device is connected with the drill tool;the machine has reasonable design and small space occupation, full-section excavation is achieved by the rotation of the drill arm and the drilling tool, the rotation speed and direction of the drillarm and the drilling tool can be adjusted, and the machine is suitable for different geological conditions.