NOVELTY - A plasma grafting basic anion exchange film is prepared by subjecting polymer powder to plasma discharge area, continuously stirring polymer powder, opening power supply, producing plasma discharge, discharging at power of 50-250 W, performing plasma discharge treatment for 10-60 minutes, performing plasma activation of vinylbenzyl ammonium chloride powder aqueous solution, heating to 40-60 degrees C, stirring for 8-72 hours, performing graft polymerization and radical anion exchange, centrifuging, filtering, washing, drying, dissolving dried powder in solvent, coating, removing film, and soaking.    USE - Preparation of plasma grafting basic anion exchange for polymer electrolyte fuel battery and alkali direct alcohol fuel battery.    ADVANTAGE - Preparation process is simple and efficient, reduces solvent consumption, does not produce pollution to environment and damage polymer matrix, and has low device requirement and mild plasma bombardment, and product has good hot stability, chemical stability, exchange capacity, and ion electrical conductivity, large surface area, increased grafting activity site, and uniform distribution of ion exchange radical.    DETAILED DESCRIPTION - A plasma grafting basic anion exchange film is prepared by subjecting polymer powder to plasma discharge area, continuously stirring polymer powder, opening power supply, producing plasma discharge, discharging at power of 50-250 W, performing plasma discharge treatment for 10-60 minutes, performing plasma activation of vinylbenzyl ammonium chloride powder aqueous solution, heating to 40-60 degrees C, stirring for 8-72 hours, subjecting vinylbenzyl chloride monomer to powder graft polymerization, performing radical anion exchange on polymer powder surface, centrifuging mixture form reaction, filtering, washing with deionized water, drying, dissolving dried powder in solvent, coating cast film, obtaining anion exchange membrane, soaking anion exchange membrane to 1-2 mol/L alkali solution for 10-60 hours, removing film, washing with deionized water, and soaking.    DESCRIPTION OF DRAWING(S) - The drawing shows a graph of alkaline anion exchange membrane of a nitrogen atmosphere with temperature change in mass. (Drawing includes non-English language text).