The present disclosure relates to a display screen assembly, an electronic device and a manufacturing method of the display screen assembly. The display screen assembly includes a bracket, a display screen, a cover plate and a decoration enclosure. The bracket includes a bottom wall and a side wall. The display screen includes a top surface and a bottom surface provided on the bottom wall. The display screen and the side wall are located at two opposite sides of the bottom wall respectively. The bottom surface of the cover plate is joined with the top surface of the display screen. The cover plate has a groove at a side wall thereof. The decoration enclosure includes a first joining part and a second joining part coupled mutually, the first joining part is received in the groove, and the second joining part is joined with the side wall of the bracket.