The invention belongs to the technical field of air bearings, and particularly relates to a cylindrical pin type foil fixing structure of an aerodynamic pressure foil bearing. The structure comprisesa bearing sleeve, a corrugated foil, a flat foil and two cylindrical pins. A cuboid groove is formed in the inner wall of the bearing sleeve, a cylindrical groove is formed in the wall body, and a cross position exists between the cylindrical groove and the middle of the cuboid groove, and the cylindrical groove and the cuboid groove communicate with each other; the corrugated foil and the flat foil are respectively arranged inside the bearing sleeve, the corrugated foil folding angle and the flat foil folding angle are inserted into the cuboid groove and the cylindrical groove, and the two cylindrical pins are respectively embedded into the cylindrical groove from the two ends of the cylindrical groove, so that the corrugated foil and the flat foil are fixed in the bearing sleeve. According to the cylindrical pin type foil fixing structure of the aerodynamic pressure foil bearing, the cylindrical groove with two ends where the cylindrical pins can be embedded is designed in the bearing sleeve, and the purpose of fixing the corrugated foil and the flat foil is achieved by utilizing the cylindrical pins. Once the flat foil is abraded, only the cylindrical pins need to be removed toreplace the corrugated foil and the flat foil, the whole bearing sleeve does not need to be machined again, the time is saved, and the cost is greatly saved.