The invention discloses a defogging blade processing device. The defogging blade processing device comprises a machine body, a feeding hopper, a discharging port, and a forming mould, wherein the feeding hopper, the discharging port and the forming mould are arranged on the machine body, the forming mould comprises a mould installing port and a forming mouth mould, the mould installing port is formed in the machine body, the forming mouth mould is embedded inside the mould installing port, the forming mouth mould comprises a front template, a rear template, and a forming plate which is clampedbetween the front template and the rear template, the forming plate is provided with at least two sets of forming holes, each set of forming holes comprises at least two rows of extruding holes withdifferent diameters, material through holes with the number of rows the same with the number of sets of the forming holes are formed in the front template and the rear template, the distance between every two adjacent rows of material through holes is equal to the distance between every two adjacent sets of forming holes, and the diameter of the material through holes is equal to the diameter of the extruding hole with the largest diameter; the forming mouth mould formed by the front template, the forming plate and the rear template can switch the size of formed PP bar materials according to the requirement, and it is unnecessary to detach and change the forming mouth mould so that device debugging time can be reduced and the purpose that the production efficiency of the bar materials is increased can be achieved.