Gas turbine interstage sealing structure

The utility model discloses an interstage sealing structure of a gas turbine. The radial section of a heat insulation tile is in a 7 shape formed by a transverse part and a longitudinal part; the sealing ring is integrally formed and is provided with a front end wall, a far-axis ring wall and a near-axis ring wall which are coaxial; the front end of the far-shaft annular wall is connected to the rear side of the far-shaft end of the front end wall; the front end of the paraxial annular wall is connected to the rear side of the paraxial end of the front end wall; the transverse part of the heat insulation tile faces forwards and is sealed and fastened together with the far-shaft ring wall of the sealing ring through N threaded positioning pins; the longitudinal part near-axis end of the heat insulation tile is hermetically connected with the near-axis ring wall rear end of the sealing ring; the front end wall of the sealing ring is fixed to the near-axis part of the diffuser. The far-shaft ring wall of the sea