A vertical household hair washing robot, comprising a shell (1), a rotating device, a roller (3), a linear guide rail mechanism, and a control system. A groove-shaped flushing pool is provided on the front side surface of the shell (1). The semi-annular rotating device is provided in the flushing pool. A semi-annular opening end of the rotating device faces downwards and is driven to rotate by a transmission mechanism installed in the shell (1). The roller (3) is further provided in the flushing pool by means of a second bearing (27). The roller (3) is provided on the shell (1) at the relative position of the semi-annular opening end of the rotating device. The lower end of the flushing pool is provided with a small opening part (4). The rear side surface of the shell (1) is slidably provided on the linear guide rail mechanism by means of a sliding block (17). The sliding block (17) can adjust the height position of the shell (1) by means of the linear guide rail mechanism, and a control system is provided in the shell (1). The hair washing robot is simple to operate, low in price, small in occupied space, safe in cleaning, good in effect and the like, and is more suitable for use at home.