Novel dovetail groove sealing structure

The utility model discloses a novel dovetail groove sealing structure which comprises a sealing cover plate and a groove milling part, and the sealing cover plate is arranged above the groove milling part. A rectangular groove is formed in the groove milling part, and two dovetail inlaid strips which are oppositely arranged in the direction are placed in the rectangular groove; a countersunk bolt hole for mounting a connecting bolt is formed in the dovetail panel; a sealing ring is arranged between the two dovetail inlaid strips; the top plane of the dovetail panel and the top plane of the groove milling part are positioned on the same straight line, and the top plane of the dovetail panel can be slightly lower than the top plane of the rectangular groove; the connecting bolt penetrates through the countersunk bolt hole and is embedded into the milling groove part; the sealing rings are O-shaped rings, and dovetail grooves of the O-shaped rings are the same in length; the dovetail panel is a right trapezoid p