A display screen assembly, a method for assembling display screen assembly and an electronic device are provided. The display screen assembly includes: a cover plate, a connector, a display screen and a bracket. The connector includes a first joining portion coupled to a lower surface of the cover plate, a second joining portion and a third joining portion. The display screen includes a display area and a non-display area. A top surface of the display screen is joined to the lower surface of the cover plate. The first joining portion is supported on the top surface of the display screen and corresponds to the non-display area. The bracket includes a top portion joined to a bottom surface of the display screen, and a bottom portion. The second joining portion runs through the top portion and the bottom portion. The third joining portion abuts against the bottom portion.