Laser in-situ auxiliary turning and milling composite device and control method thereof

The invention belongs to the related technical field of laser auxiliary cutting machining, and discloses a laser in-situ auxiliary turning and milling composite device and a control method thereof, and the device comprises a machining unit, an optical unit and a laser control unit; the machining unit comprises a hollow main shaft and an integral cutter handle, the integral cutter handle is arranged at the lower end of the hollow main shaft, and the integral cutter handle is a milling cutter handle or a turning tool handle; the optical unit comprises a laser generator, a laser output head, a collimating lens, a focusing lens and a reflecting mirror which are arranged in the milling cutter handle, and a focusing lens arranged in the turning cutter handle; the laser control unit comprises a dynamometer and a control system; and a locking structure is arranged in the circumferential direction of the hollow main shaft, when the integral tool handle is a turning tool handle, the locking structure is locked, and whe