Abstract: TiO₂/bentonite composite photocatalyst is a kind of functional material for environment,which is gathering focus from researchers home and abroad in these years.The progress in research on preparation and application in environmental pollutant treatment of TiO₂/bentonite composite photocatalyst are reviewed in this paper.The modification of both bentonite and TiO₂ of composite photocatalyst are introduced in detail and the problems and new development tendency in the research of TiO₂/bentonite composite photocatalyst are also proposed.