Abstract: The development of photocatalytic oxidation technology used in the environment protection has shown bright prospect and huge market in the furture.This technology,especially the one driven by solar energy has the characteristic of fully using the clean energy,and can be used for degradation of the organic harmful contaminants in the air and the waste water,as well as for the elimination of heavy met al from the waste water and the deep treatment for minute pollution drinking water.The concise analysis has been carried on of some problems and key technology existing at present.