Tendinous sheath loosening knife

The utility model provides a tendon sheath releasing knife special for an operation for releasing adherent tendon sheath, which comprises a knife body and a knife handle. The blade of the knife body is crescent, and the knife tip faces towards the inclined upper part of the knife body. In an operation, a tendon sheath to be released is detected out at an inflammatory part of the tendon sheath, then the knife tip of the releasing knife is extended into the tendon sheath transversely, the tendon sheath is cut lightly along the blade, and the knife is withdrawn to finish the operation; and the tendon sheath releasing knife has the advantages of quick and simple method, small incision, little pain of a patient, and quick incision healing.