A photoioncatalytic reactor includes a shell, a device for driving photoioncatalytic reaction, a photocatalytic filter, and at least one sheltering board. The device for driving photoioncatalytic reaction is disposed in the shell. The photocatalytic filter located in the shell surrounds the device for driving photoioncatalytic reaction, wherein the photocatalytic filter is taper. The at least one sheltering board is disposed between the shell and the photocatalytic filter.一種光水離子化反應器,包括殼體、光水離子化反應驅動裝置、光觸媒濾網以及至少一擋板。光水離子化反應驅動裝置設置於殼體中。光觸媒濾網在殼體中環繞光水離子化反應驅動裝置,其中光觸媒濾網為錐狀。至少一擋板設置於殼體與光觸媒濾網之間。100‧‧‧光水離子化反應器102‧‧‧殼體102a‧‧‧入風孔102b‧‧‧出風孔104‧‧‧光水離子化反應驅動裝置106‧‧‧光觸媒濾網108‧‧‧擋板110‧‧‧第一固定環112‧‧‧第二固定環116‧‧‧固定結構120‧‧‧風扇122‧‧‧前置濾網124‧‧‧安定器124a‧‧‧安定器固定架124b‧‧‧電源插座126‧‧‧光水離子化觸媒蜂巢濾網F‧‧‧氣體流動方向R‧‧‧區域
