Film blowing device of film blowing machine

The invention belongs to the technical field of film blowing machines, and particularly relates to a film blowing device of a film blowing machine, which comprises a workbench, the upper end of the workbench is fixedly connected with a conveying bin, and the lower end of the right side of the conveying bin is communicated with a film blowing machine body through a material guide pipe; an adjustable fixed-ratio discharging mechanism used for discharging two different kinds of raw materials is arranged at the upper end of the box body, the quantitative discharging effect with the adjustable ratio can be achieved for the two different kinds of raw materials, it is guaranteed that the raw materials are evenly proportioned, and compared with an existing electric device for controlling proportioning, the quantitative discharging device is easy and convenient to use, saves labor and improves the production efficiency. The maintenance cost is low, and faults are not prone to occurring; the raw materials can be unifor