The invention discloses a sealing retaining ring applied to a combustion turbine. The sealing retaining ring applied to the combustion turbine is characterized in that a mounting groove is formed in a position where the sealing retaining ring is in contact with the root part of a stationary guide blade; a wear-resisting component is arranged in the mounting groove; the wear-resisting component is provided with a lug boss; the lug boss is in contact with the stationary guide blade. By using the sealing retaining ring applied to the combustion turbine, the problems that the sealing retaining ring is difficult to restore due to long-term abrasion and the disc constant temperature (DCT) of a rotor of the combustion turbine is finally caused to be slightly higher are fundamentally solved; the service life of a root of the stationary guide blade and the sealing retaining ring is prolonged; the mounting process is simple, convenient and economical.