The invention discloses a spin vibration sieve umbrella-shaped cap polishing and supporting device. The spin vibration sieve umbrella-shaped cap polishing and supporting device comprises a lower rotating supporting mechanism and an upper clamping positioning mechanism. The rotating supporting mechanism mainly consists of a supporting frame, a motor, a reducer and a connecting shaft. The clamping positioning mechanism mainly consists of a rotating platform, an up-down crossed type bidirectional lead screw, a supporting body and workpiece clamping blocks. The spin vibration sieve umbrella-shaped cap polishing and supporting device is simple in structure, and convenient to use, the spin vibration sieve umbrella-shaped caps with different models can be quickly clamped and fixed on the supporting device, and the spin vibration sieve umbrella-shaped cap polishing and supporting device can conveniently cooperate with a polishing machine on the polishing treatment.