The invention discloses a washing machine dewatering tub with a support. The washing machine dewatering tub comprises a tub body and the support. The support is composed of a circular ring and arc plates uniformly distributed on the circular ring. The circular ring is arranged at an opening of the dewatering tub, a plurality of small holes are formed in the circular ring, installation holes are formed in the arc plates, the arc plates are fixed to a washing machine shell through screws, and the upper surface of the circular ring is inclined downwards from exterior to interior. The washing machine dewatering tub has the advantages of being simple in structure, reasonable in design and capable of effectively lowering vibration of the dewatering tub.