The invention provides an ion exchange method to prepare metal ion mixed titanium oxide (TiO2) line pipe material and the steps comprise that: lamellar sodium titanate line pipe material which is converted by metal ions is treated for 4-40 hours at the temperature of 60-240 DEG C in a reactor with water; or the lamellar sodium titanate line pipe material mixed with metal saline solution is treatedfor 4-40 hours at a temperature of 60-240 DEG C in a reactor to obtain metal ion mixed TiO2 line pipe material. The preparation process is simple, the reaction conditions are easy to control and theproduct obtained has grant potential application in optical catalysis or photoelectric conversion field and luminescence material field.