The invention discloses a sewage precipitation pool cleaning device, which comprises a pool, a motor and a brush sleeve, wherein a water inlet is formed in the upper end of the left side of the pool,a cleaning liquid opening is formed above the water inlet, a water outlet is formed in the lower end of the right side of the pool, a rotating shaft is arranged above the motor, a rotating rod is arranged above the rotating shaft, first cleaning brushes are arranged on the two sides of the rotating rod, a first cleaning brush is arranged above the first cleaning brush, a hinge is arranged below the second cleaning brush, a cleaning bracket is arranged above the hinge, projection blocks are arranged on the two sides of the cleaning bracket, nuts are arranged on the two sides of the cleaning bracket, a filtering screen is arranged at the bottom of the brush sleeve, and clamping grooves are formed in the two sides of the filtering screen. According to the sewage precipitation pool cleaning device, the brush is connected to the cleaning bracket in a sleeved mode, and the cleaning bracket stretches into the filtering screen, so that the filtering screen can be cleaned conveniently, and thecleaning mode is effective.