The utility model discloses a sealing device and a compressor, and relates to the technical field of sealing. The sealing device comprises a first sealing shell, a second sealing shell, a sealing shaft sleeve, a sealing ring and a sealing carbon ring. The first sealing shell is provided with a first sealing groove and a first sealing ring groove; the second sealing shell is provided with a secondsealing groove and a second sealing ring groove; the first sealing shell and the second sealing shell are detachably and movably connected to form a first sealing cavity. The first sealing groove andthe second sealing groove form a second sealing cavity; the first sealing ring groove and the second sealing ring groove form a sealing ring cavity; the sealing carbon ring is arranged in the second sealing cavity, the sealing carbon ring is elastically connected to the first sealing shell and the second sealing shell, the sealing ring is arranged in the sealing ring cavity, the sealing shaft sleeve is arranged in the first sealing cavity, and the sealing shaft sleeve is connected with the first sealing shell and the second sealing shell in a clearance fit mode. The sealing device can solve the problems that a traditional compressor shaft end is high in sealing cost and media are prone to leakage.