Anti-leakage threaded connection flange

The utility model is suitable for the auxiliary technical field of threaded connection flanges, and discloses an anti-leakage threaded connection flange which comprises a flange plate, an insertion groove is formed in the middle end of the inner side of the flange plate, transmission blocks are installed at the upper end and the lower end of the inner side of the insertion groove in a sliding mode, and a pushing plate is fixedly installed on the surface of the right side of each transmission block. After a pipe orifice is in contact with the inclined surfaces of the transmission blocks, along with continuous pushing of a pipeline, the two groups of transmission blocks can drive the pushing plates to synchronously, vertically and relatively move, and then corresponding outward pushing force is provided for the right side of the rotating rod, so that the rotating rod can rotate by taking the I-shaped rod as the circle center; and then the abutting plates are driven to synchronously move oppositely to be attache