Pervious concrete with water purification function was prepared by introducing purification materials （fly ash， sulfuric acid modified fly ash） into pervious concrete. The effects of purification material content on mechanical properties， porosity， water permeability and adsorption of Zn²⁺ in water of pervious concrete were studied. The results show that the addition of sulfuric acid modified fly ash can promote the formation of hydrated calcium silicate gel， improve the pore structure of pervious concrete， and improve the mechanical properties and Zn²⁺ adsorption effect. When the use level of sulfuric acid modified fly ash is 20%， the compressive strength of pervious concrete specimens reaches the peak， and the porosity and permeability coefficient decrease to the lowest value. With the increase of use level of purification materials， the adsorption effect of Zn²⁺ of pervious concrete is gradually obvious.