The invention discloses a method for preparing a supercapacitor through continuous printing, wherein an electrode material, a diaphragm and an electrolyte solution are continuously deposited on the surface of a substrate according to a certain sequence through a printing method to form supercapacitors with different structures, the electrode material is a carbon material, a conductive macromolecule, metallic oxide or the like; the diaphragm is nonconductive nanofiber; the electrolyte solution is a quasi-solid polymer electrolyte; the sizes, the shapes and the integration modes of the electrode material and the diaphragm of the supercapacitor are achieved by designing the shape of a baffle plate; the integrated substrate of the supercapacitor is made of plastic, paper, glass, cloth and the like. The method has the advantages that the preparation method is simple, the designability is strong, the applicability is wide, the prepared supercapacitor is light and thin, has an excellent electrochemical performance, has a broad application prospect in the fields of integration circuits, flexible wearable electronic devices, green energies, aerospace, defense-related science and technology and the like, and is expected to achieve industrialized production.