The invention discloses a technology and device for manufacturing a toilet lid with a three-dimensional changing pattern, and to the technical field of bathroom ware processing. The technology comprises the following steps: firstly, manufacturing the upper lid base plate and lower ring base plate of the toilet lid; then, respectively coating putty ash on the whole surface of the upper lid base plate and lower ring base plate of the toilet lid, and polishing; preparing a PET (Polyethylene terephthalate) film printed with patterns; spraying glue on the polished upper lid base plate and lower ring base plate of the toilet lid, and laminating in a vacuum laminator; after lamination, removing residual PET films; and finally, spraying the coincident crack of the PET film by utilizing varnish soas to achieve a waterproof effect. The production technology is simple; the upper lid base plate and lower ring base plate of the toilet lid are stuck with the PET film by virtue of a self-designed vacuum laminator; and upper air supply and lower air suction are utilized to guarantee good adhesiveness of the upper lid base plate and lower ring base plate of the toilet lid and the PET film. The prepared production has the advantages of three-dimensional changing pattern good visual effect and enhanced beauty.