Embedded flange connecting structure

The utility model relates to an embedded flange connecting structure. The technical problem that an existing flange is poor in connection and sealing effect is solved. The embedded flange connecting structure comprises a flange pipe, one end of the flange pipe is provided with a flange edge extending outwards in the radial direction, the inner wall of the end, close to the flange edge, of the flange pipe is provided with an annular inclined face with the inner diameter gradually increasing outwards, and the annular inclined face is provided with at least two annular steps arranged at intervals in the axial direction; the flange connector comprises a cylindrical connecting pipe, a flange ring axially abutting against the flange edge and an embedded conical cylinder arranged at one end of the flange ring and correspondingly embedded into the inner wall of the flange pipe, and the outer wall of the embedded conical cylinder is attached to the inner wall of the annular inclined face. According to the embedded fla