The invention relates to a method for machining a hot-dipped galvanized steel sheet having two faces with different types of spangles, belonging to the technical field for machining hot-dipped galvanized steel sheet. The method comprises the steps of rolling a base plate, washing, annealing, zinc boiler galvanizing and skin rolling. The method is characterized in that the surfaces of an upper working roll and a lower working roll for rolling the base plate in the step of rolling are processed in a way of roughening so that the surfaces of the upper working roll and the lower working roll are respectively form a roughened surface structure; the roughened surface structure on the upper working roll is different from the roughened surface structure on the lower working roll; when the upper working roll and the lower working roll with the roughened surface structures roll the base plate, the two faces of the base plate are respectively form the roughened surface structure of the base plate, wherein, the roughened surface structure of the base plate formed at one face of the base plate is different from the roughened surface structure of the base plate formed at the other face of the base plate. The method is good for saving zinc raw materials and reducing cost for manufacturers and is helpful for users to elect according to use and request.