Thrust foil bearing with high impact resistance

The utility model discloses a thrust foil bearing with high impact resistance. The thrust foil bearing comprises a bottom plate, a middle-layer supporting plate and a plurality of fan-shaped flat foils, the middle-layer supporting plate replaces bump foils in an original structure to conduct elastic buffering, the inner end face and the outer end face of the middle-layer supporting plate are not planes, a plurality of protruding parts which are evenly distributed in the annular direction are arranged on the inner side end face of the middle-layer supporting plate, each protruding part is covered with the corresponding flat foil, the protruding parts are arranged close to the free ends of the flat foils, and wedge-shaped gaps are formed between the flat foils and the thrust plate. A plurality of concave areas which are evenly distributed in the annular direction are arranged on the end face of the outer side of the middle-layer supporting plate, and the protruding parts are located in the concave areas. During