Abstract: The development of high voltage pulse power supply was reviewed briefly. Non-equilibrium plasma water treatment reactors that were used in the current research were classified as liquid phase，gas phase，gas-liquid two phases and gas-liquid-solid three phases. The structure of reactors was summarized，the advantage and disadvantage of these reactors were analyzed and the development trends were discussed. The kinds of catalysts added in reactors were introduced and the functions of catalysts in the pulse discharge process were analyzed. Some problems in the use of catalysts and the directions in future study were discussed.