The invention relates to a suspension insulator filth deposition accelerating device.The device is characterized in that a filth deposition tank (6) is included, and the side wall of the filth deposition tank (6) is provided with an inlet and an outlet, wherein the inlet is communicated with an air blower (1) through a pipeline, the pipeline is further communicated with a filth powder discharge device, and a powder filter device (9) is installed at the outlet; the top of the filth deposition tank (6) is fixedly provided with a low-voltage end threaded rod (5), and the side wall of the filth deposition tank (6) is fixedly provided with a high-voltage end threaded rod (8), wherein the low-voltage end threaded rod (5) is connected with the low-voltage end of a suspension insulator (7) arranged in the filth deposition tank (6) through a wire, and the high-voltage end of the suspension insulator (7) is connected with the high-voltage end threaded rod (8) arranged in the filth deposition tank (6) through a wire.The device has the advantages that air flow entering the filth deposition tank can be controlled by a speed regulating device of the air blower, the vibration amplitude is regulated through input air pressure of an industrial vibrator, and then the filth powder diffusing amount is controlled.