The utility model discloses a rimless embedded lamp, which relates to the technical field of lamps, in particular to a rimless embedded lamp, which comprises a lamp cavity carrier and a lampshade, a round rod is rotatably connected inside the lamp cavity carrier through a bearing, an adjusting disc is mounted at the bottom of the round rod, a gear is mounted at the top of the round rod, and the gear is meshed with a rack rod through teeth. An extension plate is installed at the end of the rack rod, a T-shaped sliding block is installed on the side face, away from the teeth, of the rack rod, and threaded holes are formed in the lamp cavity carrier and the adjusting disc. The rimless embedded lamp has the effect of facilitating lamp installation, a lamp cavity carrier is embedded into a wall, through cooperation of a gear and a rack rod, an extension plate can conveniently extend outwards to play a role in limiting and supporting in the wall, lamp installation is facilitated, through arrangement of bolts, the position of the extension plate is conveniently limited, and installation is convenient. The stability of lamp installation is improved, and the purpose of improving practicability is achieved.