The invention provides a manufacturing method of a 3D glass substrate-less decorative film product. The manufacturing method comprises the following steps of step S1, performing texture transfer printing on a substrate-less decorative film product; step S2, after texture transfer printing, performing electroplating on the substrate-less decorative film product; step S3, after electroplating, performing printing on the substrate-less decorative film product; step S4, after printing, performing stripping on the substrate-less decorative film product; step S5, after stripping, performing coatingon the substrate-less decorative film product; step S6, after coating, performing formation on the substrate-less decorative film product; and step S7, after formation, performing adhesion on the substrate-less decorative film product, and adhering the substrate-less decorative film product to 3D glasses. The manufacturing method provided by the invention is lower in material cost, lighter and thinner in structure of a product and higher in optical transmission, is less in adhesion bubble ratio during adhesion, can effectively increase the yield rate and improve the efficiency and particularlyhas greater advantage on improvement of adhesion bubbles at four-curved or irregular curved surface R angle positions of the 3D glasses.