Abstract: The TiO₂/polyethylene terephthalate (PET) nonwoven was prepared by TiO₂-loaded on the recycled PET nonwoven fabric. The PET nonwoven fabric was firstly treated by alkali etching and the TiO₂ was obtained by hydrolysis reaction of tetrabutyl titanate (TBT). The uniform TiO₂ particles can be observed through SEM when the TBT content is 6wt%. The influence of the alkali etching temperature and TBT content on the mechanical property of PET and TiO₂/PET nonwoven fabric was investigated. The results show that the alkali reduction increases and the tenacity of PET nonwoven fabric gradually decreases with the increasing of alkali etching temperature. The tenacity of the nonwoven fabric by etching at 60℃ and 80℃ is comparable at the same TBT content, because the formation of the loaded TiO₂ improves the mechanical properties of the TiO₂/PET nonwoven fabric. The tenacity of TiO₂/PET nonwoven fabric increases firstly and then decreases with TBT content increasing. The TBT content that corresponding to the maximum tenacity increases with the increase of temperature. In order to character the photocatalytic self-cleaning properties of TiO₂/PET nonwoven fabric, methyl orange solution was used as a degradation substance, TiO₂/PET nonwoven fabric was treated under ultraviolet light with 30 W, and the apparent depth of color was tested using a colorimeter. The results show that the photo degradation performance is the best when the alkali etching temperature is 80℃ and TBT content is 6wt%, the degradation of methyl orange solution is 89.05% and this ratio just decreases 1.43% after five cycles. The results are all attribute to the higher special surface area and the formation of uniform TiO₂ on the PET fiber surface at 80℃ and 6wt% TBT.