The invention relates to the technical field of air feeder accessory devices, in particular to an inlet current stabilizing device of a unilateral supporting centrifugal air feeder. By means of the inlet current stabilizing device of the unilateral supporting centrifugal air feeder, airflow pressure pulses such as airflow unevenness and eddies can be effectively prevented from occurring among a current collector, an adjuster and an impeller, airflow at a fan inlet runner is distributed in a balanced mode, the vibration and noise source of a fan flow collector inlet is eliminated, vibration fracture of related accessory components is effectively avoided or reduced, and the practicability is improved. The inlet current stabilizing device comprises a shell, a spindle, the impeller, the adjuster and an air inlet tank, and further comprises a current stabilizing device body; a working cavity is formed inside the shell; an air inlet is formed in the right end of the shell; the current collector is arranged at the air inlet; the right end of the spindle extends into the working cavity to be connected with the impeller; the left end of the spindle is connected with a motor through a coupler; the current stabilizing device body comprises a cylinder and five sets of wing plates which are evenly installed on the outer side wall of the cylinder in the circumferential direction of the cylinder; and the extension direction of the five sets of wing plates is coincident with the airflow direction.