The invention discloses a window patching machine. The window patching machine comprises a rack, a conveying device and more than two punching devices, wherein the conveying device is used for conveying a plastic film, the punching devices are arranged on the rack, the punching devices are used for punching the plastic film, and all of the punching devices can be aligned from front to back along the conveying direction of the plastic film. According to the window patching machine, all of the punching devices can be used for independently punching mounting holes respectively, so that the production efficiency is improved; through holes punched by all of the punching devices can be partially overlapped, so that mounting holes of which the shapes are different from the shapes of punches can be obtained, and the shapes of the mounting holes processed by the window patching machine are rich and different; especially for elongated mounting holes, the punching interval time of all of the punching devices is changed, so that the spacing between all of the through holes can be changed in the condition that the punches do not need to be replaced, thereby flexibly changing the length of the mounting holes, effectively extending the application range of the window patching machine, reducing the replacement and purchase cost of the punches, reducing the influence on the production efficiency and facilitating the use.