The invention relates to a method for preparing a textile fiber/graphene/Bi2WO6 composite environmental catalytic material. The method comprises the steps: dipping textile fibers into a saturated dispersion solution of graphene oxide, then, carrying out baking, carrying out washing, then, putting the textile fibers into a reducer solution, carrying out a reaction for 0.5 to 1 hour at the temperature of 50 DEG C to 80 DEG C, carrying out washing, and carrying out baking, so as to obtain textile fiber/graphene; and adding the textile fiber/graphene into a solution of Bi(NO3)3 and Na3PO4, carrying out stirring, then, adding Na2WO4 and urea into the solution, carrying out a hydrothermal reaction for 3 to 8 hours at the temperature of 120 DEG C to 180 DEG C, carrying out cooling, then, carrying out washing, and carrying out baking, thereby obtaining the textile fiber/graphene/Bi2WO6 composite environmental catalytic material. The method disclosed by the invention is simple and is adaptable to industrial production; and the obtained composite material has a relatively good environment purification effect.