Interstage flow guide disc structure of two-stage gas turbine or high-pressure turbine

The invention discloses an interstage flow guide disc structure of a two-stage gas turbine or a high-pressure turbine. The interstage flow guide disc structure comprises a flow guide disc; the flow guide disc comprises a mounting part, an abutting part and a sealing part; the mounting part is arranged on a first-stage turbine disc and/or the mounting part is arranged at the connecting end of a second-stage turbine disc, and the mounting part is used for connecting the flow guide disc with the first-stage turbine disc and the second-stage turbine disc; the abutting part is arranged on the outer wall opposite to the first-stage turbine disc and/or the abutting part is arranged on the outer wall opposite to the second-stage turbine disc, and the abutting part is used for sealing between the first-stage turbine disc and the second-stage turbine disc and preventing cooling gas in a cooling channel from leaking; the sealing part is arranged at the end part of the outer edge of the flow guide disc, and the sealing p