The invention discloses a ceiling-mounted type junction box. The ceiling-mounted type junction box comprises a box body; a deconcentrator is arranged in the box body; the deconcentrator is connected with a wire inlet terminal and a wire outlet terminal which run through the box body separately; the ceiling-mounted type junction box also comprises a mounting plate; and the mounting plate is connected with the box body through an elastic part. The ceiling-mounted type junction box disclosed in the invention is scientific and reasonable in structural design; when the junction box is mounted, a screw passes through the mounting plate to fix the mounting plate on the ceiling surface of the interior of a building, and then a cable or an optical fiber is connected with the wire inlet terminal andthe wire outlet terminal respectively, and next, the cable or the optical fiber is fixed on the ceiling, so that convenience in wiring is realized, the wall space is not occupied, and the wall surface can be more attractive; a maintainer can pull down the box body by hooking a handle through a long-rod hook, and then the box cover can be opened to perform circuit overhaul very conveniently; and after releasing, a spring retracts to the original length and the box body rebounds to the top of the building immediately, so that a large amount of indoor space can be saved.