The invention provides a method for manufacturing a curved surface shell of an electronic device, which comprises the steps of preparing a translucent base shell having a decorative film; fixed-point hot pressing the decorative film to attach and position the decorative film on an inner surface of the translucent base shell; placing the translucent base shell in a vacuum sealed space to tightly bonding the decorative film to the translucent base shell; and hydraulic pressing the decorative film by high pressure and high temperature so as to be smoothly bonded to the inner surface of the translucent base shell in a liquid solvent.