Laser plumb aligner with horizontal laser point

The utility model discloses a laser plumb aligner with a horizontal laser point. The laser plumb aligner comprises a shell, an upper laser point generating mechanism and a lower laser point generating mechanism arranged in the shell, and the laser plumb aligner is characterized in that the upper laser point generating mechanism comprises a laser, a beam splitter prism, a rectangular prism and an objective lens prism; the laser beam sent by the laser passes through a beam splitter prism, one of laser beams sent by a laser device is reflected through the rectangular prism to form a vertical upward laser beam through the beam splitter prism and is emerged through the objective lens prism, an exit position is provided with a pentagonal prism, and the pentagonal prism is provided with a first reflecting surface and a second reflecting surface; the angle of the first reflecting surface and the second reflecting surface enables the reflected light to be horizontally emerged, the first reflecting surface of the penta