An　experimental　study　on　VOCs　removal　with　photocatalyst　in　a　batch　reactor　was　carried　out　at　atmospheric　pressure　and　room　temperature.　TiO2　thin　film　photocatalyst　coated　on　glass　spring　was　prepared　with　dip-coating　method.　The　photocatalyst　was　extensively　characterized　by　means　of　spectroscopy　(XRD)　and　microscopy　(SEM).　Toluene　was　taken　as　the　typical　VOCs　for　photocatalytic　degradation　as　a　function　of　gas　flow　rate　and　single　versus　mixed　gases.　The　study　indicated　that　flow　rate　influenced　the　degradation　significantly　and　there　were　the　optimal　values;　the　difference　between　single　gas　and　the　mixed　gas　was　remarkable　and　the　degradation　rate　of　mixed　toluene　in　VOCs　were　higher　than　single　toluene.　Mechanism　of　titania-assisted　photocatalytic　degradation　of　toluene　was　also　investigated　in　the　paper,　toluene　molecule　was　turned　into　CO2　and　H2O　in　the　end.