In this study, CX-TiO2-La(x) series composites were prepared by sol-gel method and doped with metal element lanthanum to modify TiO2, which were used to treat simulated soil leaching (solubilization) wastewater under visible light, and the structure and properties of the materials were characterized. The results show that CX-TiO2-La(x) series composites can achieve enrichment and degradation of solubilized PHE. All CX-TiO2-La(x) series composites is mainly composed of amorphous carbon, rutile TiO2 and La2Ti2O7. When the addition of lanthanum chloride was 0.5%, the removal efficiency of CX-TiO2-La(0.5) for solubilized PHE was the best, reaching 83.6% (irradiated with 500 W xenon lamp for 5 h). CX-TiO2-La(x) series composites were all with characteristics of mesoporous, moreover, the composite second-order kinetic model of PHE adsorption process fits well with Langmuir model with a spontaneous chemical adsorption process. It was speculated that the heterojunction structure formed to expanded the corresponding photocatalytic range of TiO2, and achieved high photocatalytic degradation efficiency under visible light. After 8 cycles, CX-TiO2-La(0.5) still had a high removal efficiency of solubilized PHE.