The invention discloses an inferior-stable-state amorphous carbon coating compressor sealing ring and belongs to the technical field of sealing rings and aims at solving the technical problem that inthe prior art, an inner and outer ring split sealing ring is adopted, and consequently the connecting stability is poor. The inferior-stable-state amorphous carbon coating compressor sealing ring is provide, the connecting stability of the inner ring and the outer ring of the sealing ring is improved, and the sealing performance of a compressor is improved. The sealing ring comprises a body. The body comprises a main sealing ring and an inner auxiliary sealing ring, wherein the main sealing ring and the inner auxiliary sealing ring are combined to be used and are the same in height. The innerauxiliary sealing ring is installed in the main sealing ring through an annular alloy lock catch. The outer side of the annular alloy lock catch is provided with a main protrusion and a reverse auxiliary protrusion. The inner side of the annular alloy lock catch is provided with a bearing groove and a limiting boss. A bearing groove matched with the main protrusion and the reverse auxiliary protrusion of the annular alloy lock catch is formed in the position of an externally-connected outer protrusion of the inner auxiliary sealing ring. A limiting groove matched with the limiting boss is formed in the clamping connecting outer edge of the main sealing ring.