The invention belongs to the technical field of bridge cleaning equipment and particularly relates to a bridge handrail cleaning device. The bridge handrail cleaning device comprises a base and a handrail, a plurality of idler wheels are mounted at the lower end of the base, and a lifting mechanism is arranged at the upper end of the base. A water tank is fixedly connected to the upper end of thelifting mechanism, a vertical plate is fixedly connected to the lifting mechanism, and a rotating mechanism is fixedly connected to the side wall of the vertical plate and arranged on the side wall ofthe end, away from the water tank, of the vertical plate. A first brushing plate is fixedly connected to the end, away from the vertical plate, of the rotating mechanism, a control mechanism is fixedly connected to the side wall of the vertical plate, and a second brushing plate is rotatably connected to the end, away from the vertical plate, of the control mechanism and located over the first brushing plate. A supporting arm is fixedly connected to the side wall of the vertical plate and located over the control mechanism. The bridge handrail cleaning device has the advantages that the efficiency of bridge handrails can be effectively improved, the handrails of different shapes can further be effectively cleaned, and the using range of cleaning equipment is effectively enlarged.