The invention relates to a self-fixing rotary bicycle riding balance simulator. The simulator comprises a balancing device for placement of the front wheel of a bicycle, and a roller device used for placement of the rear wheel of the bicycle, wherein the balancing device comprises a base and a rotary part which is connected on the base in a rotating manner; one end of the rotary part is connected on the base in a rotating manner, and the other end of the rotary part is in a free state; the rotary part is provided with a self-fixing device used for fixing the front wheel of the bicycle; and the self-fixing device can be used for fixing the front wheel of the bicycle under the action of the gravity of the front wheel of the bicycle. The simulator has low riding gravity center, can be used for fixing the front wheel of the bicycle by means of the dead weight of the front wheel of the bicycle, is safe to ride, and has the advantages of simple structure, low manufacture cost and convenience in carrying.