Abstract: Using the sol-gel method, the Desulfurization multifunctional thin film was loaded on the Polyacrylonitrile-based activated carbon fiber (ACF) and sustained dynamic adsorption and hundreds of regeneration were carried out. Through the experimental study and analysis, the Desulfurization multifunctional group was coated on the ACF with the fiber surface evenly. The desulfurization multifunctional thin film plugging the ACF fiber surface part hole caused the specific surface area of the sample loaded Desulfurization functional group ACF, the volume and the saturated adsorption quantity are slightly smaller than the ACF. However, the directivity and adsorption of sulfide increased. After hundreds of times of back-washing regeneration, the desulfurization functional groups coated on ACF fibers had a certain degree of cracking, which caused the original blocked pore structure to be exposed again, which improved the specific surface area of sample, volume and saturated adsorption quantity. After the film was regenerated in situ, the desulfurization functional group films coated on ACF fibers were repaired as before. Under the action of ozone, in addition to the transformation of sulfide adsorption morphology, the carrier ACF would produce a regenerative self-cleaning effect, so that ACF adsorption time greatly prolonged.