The invention discloses a rim sealing structure for a high-temperature rotary wheel disc, and the rim sealing structure can be applied to the fields of ground gas turbines, aeroengines and the like. A pre-spinning airflow structure (blade type) composed of slant holes (hole type) or slant blades having a certain inclination angle is arranged on the rim sealing structure, and extra cooling airflow is introduced through the pre-spinning airflow structure; the sealing air flow of a disc cavity of the high-temperature rotary wheel disc at an axial gap of a rotary stator rim can be replenished; and meanwhile, due to the function of a slant hole/slant blade channel, secondary leakage flow air for disc cavity sealing forms an airflow angle similar to that of a main flow. The wheel disc cooling manner is simple in structure and easy to implement; and by adding the slant holes or the slant blades on the rim position sealing structural component, the blending loss of the sealing airflow and the main flow can be lowered, the heat transfer effect of the high-temperature rotary wheel disc rim position is enhanced, thereby the safety margin of the connecting portions of the blades and wheel disc tenon teeth is improved, and accordingly the running safety of an engine is improved.