Rotary linear composite motion device

The utility model provides a rotary and linear composite motion device which comprises a support, a rotary driving mechanism and a linear driving mechanism. The rotary driving mechanism comprises a turntable and a first driving piece, the turntable is rotationally arranged on the bracket, and the first driving piece is fixedly arranged on the bracket; the linear driving mechanism comprises a mounting seat, a rack, a gear and a second driving part, the mounting seat is slidably arranged on the turntable, the rack is fixedly connected with the mounting seat, the gear is rotatably arranged on the turntable and meshed with the rack, and the second driving part is fixedly arranged on the support. A to-be-driven component is mounted on the mounting seat, and when the first driving part drives the turntable to rotate, the mounting seat slidably arranged on the turntable rotates along with the turntable, so that the component is driven to rotate. Through transmission of the gear and the rack, the second driving piece