Drainage device of special-shaped continuous casting machine

The utility model provides a drainage device of a special-shaped continuous casting machine. The drainage device comprises a water removal hopper, two drainage pipes, two outer air supply pipes and two inner air supply pipes. The two drainage pipes are respectively communicated with the two sides of the water removal hopper; the two inner air supply pipes penetrate through the rear side wall of the water removal hopper and extend into the water removal hopper. The two outer air supply pipes are arranged on the rear side of the water removal hopper and used for blowing water drained out of the water drainage pipe to the outer side of the special-shaped blank. According to the drainage device of the special-shaped continuous casting machine, cooling water is discharged to the two sides of a special-shaped blank through the two drainage pipes, water flow in the water removal hopper is blown through the inner air supply pipe so that the water flow can be guided into the drainage pipes, and meanwhile water flow di