Roll changing device of coating machine

The invention relates to the technical field of coating machines, and discloses a coating machine roll changing device which comprises a box body and an electric touch screen, the electric touch screen is fixedly connected to the surface of the box body, a discharging opening is formed in the surface of the box body, a feeding opening is formed in the end, away from the discharging opening, of the box body, and a cloth containing groove is formed in the top of the box body; a winding assembly used for winding coating is arranged in the box body, a roller replacing assembly used for replacing a driving shaft is arranged in the box body, and through intermittent rotation of a cut-off half gear, a matching half gear and a roll replacing half gear, the number of times that an operator makes contact with equipment in the roll replacing process can be reduced through feeding, discharging and roll replacing; therefore, potential safety hazards caused by misoperation are reduced, production accidents caused by manual