The invention discloses a printer clamping rotating device provided with vacuum pumping and air blowing functions and capable of accurately controlling an angle. The device is characterized by comprising a servo motor, a fixing seat, a coupling, a tooling shaft, a rear pressing plate, an air charging connector, a bearing block, a front pressing plate, a jig, a first bearing and a second bearing, wherein the servo motor is mounted on the fixing seat; one end of the coupler is mounted on an output shaft of the servo motor, and the other end of the coupler is equipped with the tooling shaft; the tooling shaft passes through a hole in the rear pressing plate, a hole in the first bearing, a hole in the bearing block, a hole in the second bearing, and a hole in the front pressing plate; the rear pressing plate, the first bearing, the second bearing, the front pressing plate and the tooling shaft are mounted on the bearing block; the air charging connector is fixed to the side surface of the bearing block; the jig is mounted at the other end of the tooling shaft; air is charged into the bearing block through the air charging connector; the air is conveyed into the hole in the jig through the hole in the tooling shaft and is used for absorbing a product to the jig or blowing out the product. The device has the beneficial effects that the rotating angle of a printed product can be accurately controlled, so that the printed characters and graphs are continuous and consistent, and as a result, the printing quality is high, and the efficiency is high.