The invention discloses an electrolysis treatment apparatus of the interior surface of a bicycle cartridge headset. The apparatus comprises a baseboard, the baseboard is provided with a purification tank, the baseboard is also provided with a preparation tank, a rotating rod is arranged in the preparation tank, the lower end of the rotating rod is provided with a stirring plate, the top of the preparation tank is provided with a drive motor, the upper end of the rotating rod is connected with the drive motor, and the top in the purification tank is provided with a filter screen; and the outer sidewall of the purification tank is provided with a vibrating motor, the filter screen is connected with the vibrating motor, the baseboard is provided with a liquid storage tank, the top of the liquid storage tank is provided with a spray gun, a flexible liquid conveying tube is arranged in the liquid storage tank, the bottom of the flexible liquid conveying tube is provided with a liquid conveying ball, the flexible liquid conveying tube is connected with the spray gun, the spray gun is provided with a spray tube, and a liquid pump is arranged between the liquid storage tank and the purification tank. The apparatus can realize the electrolyte injection treatment of the interior surface of the bicycle cartridge headset, so the service life of the bicycle cartridge headset with the electrolyzed interior surface is long, and the oxidation resistance of the surface is good.