hydrogen production by photocatalytic water splitting could solve the energy crisis and environmental problems, and would become one of the hotspot of new energy research development. But the practical application of photocatalytic hydrogen production technology faced many problems, and one of the most main problem was the very low effi ciency of hydrogen production that could not reach the requirements of industrial production. So it was necessary to improve the hydrogen production effi ciency by photocatalytic water splitting. This article simply summarized the improvment methods for hydrogen production effi ciency by photocatalytic water splitting.