Vacuum device of filling machine

The utility model provides a vacuum device of a filling machine. The vacuum device comprises a filling machine body, the vacuum pipeline is communicated with the filling machine body and is used for realizing negative pressure filling; the control valve assembly comprises a connecting pipe, a pneumatic switch valve and a vacuum pressure detector, the pneumatic switch valve and the vacuum pressure detector are arranged on the connecting pipe, the first end of the connecting pipe is communicated with the vacuum pipeline, and the second end of the connecting pipe is communicated with the outside of the filling machine body; the controller is arranged on the control valve assembly and connected with the vacuum pressure detector and the pneumatic switch valve so as to control opening and closing of the pneumatic switch valve according to the detection result of the vacuum pressure detector. According to the technical scheme, the problem that the filling effect of a filling machine in the prior art is not stable is