Two-sided automatic-alignment intermittent thin film coating method

The invention provides a two-sided automatic-alignment intermittent thin film coating method especially for coating two layers of film material on a thin film to be coated intermittently. The method comprises the following specific steps of: arranging a first film coating component, a to-be-coated film component and a second film coating component respectively at an upper position (5), a middle position (7) and a lower position (6); detecting a coating window (1) on the to-be-coated film component by using a color code sensor (2); when the right edge of the window is detected, pressing upper and lower transfer printing rollers (3) onto a middle to-be-coated film so as to obtain a composite film with certain length and width. Compared with the traditional multi-layer composite film preparation process, the method has the advantages of simple process flow, high alignment accuracy, easy positioning control, capability of realizing the intermittent composite film coating, convenience in batch production and the l