The utility model discloses an electrostatic deduster for a brand new air processing unit, which belongs to the technical field of an air conditioner. The device comprises a base framework, a high voltage electrostatic generator, dust collecting screen grid frames, an upper cover board and a base support, wherein the base framework comprises high voltage electrode screens, screen grids and side boards; the screen grids are arranged at the front side and the back side of the base framework and are connected with ground wires; the side boards are arranged at the two sides of the base framework, multiple pairs of grooves are arranged at the internal sides of the side boards, and the dust collecting screen grid frames are correspondingly inserted into the grooves; the high voltage electrode screens are located between the dust collecting screen grid frames and are connected with high voltage electrode ends of the high voltage electrostatic generator; and the high voltage electrostatic generator is arranged close to the side board of the base framework. After entering the brand new air processing unit through a shield screen, air is absorbed by anions on the dust collecting screen grid frames so that dust is removed and the electrostatic deduster has the advantages of significant dedusting effect, simple structure and small size.