The invention discloses a colored steel belt washing device. The colored steel belt washing device comprises a washing cavity, a collection trough and scrubbing rollers. The upper end of the washing cavity is fixedly provided with a double-shaft motor. The left output end of the double-shaft motor is fixedly connected with a rotating shaft B. The scrubbing rollers are internally connected with movable rods in a sliding manner. The outer sides of the movable rods are connected with oscillating rods, the oscillating rods penetrate the outer walls of the corresponding scrubbing rollers, and the oscillating rods are fixedly provided with bristles. The upper end of the inner side of the washing cavity is further provided with a water guide pipe. The lower end of the water guide pipe communicates with a plurality of spray heads, the water guide pipe communicates with a water suction pump, and the water suction pump communicates with the collection trough through a guide pipe. According to the colored steel belt washing device, the arranged scrubbing rollers rotate to wash a colored steel belt, meanwhile, the movable rods arranged on the scrubbing rollers drive the oscillating rods and the bristles on the oscillating rods to swing in the directions perpendicular to the rotation directions of the scrubbing rollers so as to scrub the colored steel belt, the washing effect is improved, and by means of the arranged water suction pump and a sewage treatment cavity, water is circularly utilized, and water resources are saved.