House building wall flatness measuring device

The invention discloses a housing building wall flatness measuring device, which comprises a moving seat, a sliding frame is mounted at the top of the moving seat, and a lifting block is mounted on a driving box through a lifting driving mechanism; a plurality of mounting boxes are arranged in the detection part, pressure sensors are mounted in the mounting boxes, one end of a spring is connected to the side wall of each pressure sensor, the other end of each spring is connected with a detection head, the end of each detection head penetrates out of the detection part and the corresponding mounting box, and a ball is mounted on the side wall, away from the lifting block, of each detection head. The housing building wall flatness measuring device is provided with a pressure sensor, a spring, a detection head and a ball, the ball at the end of the detection head is in contact with a wall and is driven to roll on the wall, and when passing through a pit or a protrusion, the detection head where the ball is locat