Disclosed is a control method for a digital ink-jet printing device to carry out multicolor ink-jet printing on an intermittent rotary printing device. The method includes: determining whether a current page is the first page; if yes, calculating a length of an image to be printed on the current page by subtracting a distance between an imaging component group and a reference from a length of a page, wherein the reference is the foremost printing imaging component group in a movement direction of a printed body, and acquiring image data of the current page, the length of which is the calculated length, after delaying the distance; if no, acquiring unprinted image data of a previous page, the length of which is the distance, and image data of the current page, the length of which is the calculated length.