The invention provides a modified polyaniline wet type electrostatic dust collector anode module. The modified polyaniline wet type electrostatic dust collector anode module comprises a plurality of anode tubes and electric conduction polyaniline painted on the anode tubes. A preparation method of the electric conduction polyaniline comprises the following steps that first, aniline is added to proton acid liquid and stirred evenly and an oxidant solution is slowly added for reaction; second, after reaction is finished, filtering is conducted, washing and filtering are conducted through acid, acetone and distilled water in sequence till filtrate is transparent and colorless, and then drying is conducted; and third, the dried modified polyaniline is dissolved in an organic solvent to serve as the electric conduction coating to be painted on a prefabricated anode module. The electric conduction polyaniline prepared through the method has the superior processing performance and keeps good dispersibility and electric conduction performance in organic matter.