The utility model relates to an anti mosquito filter device applied to a mobile light source.It has a light source outlet.The mosquito repellent filter device comprises a cover body unit and a mosquito repellent filter；The cover unit is detachably clamped on the light source outlet.It has a top wall and a transparent side wall extending from the top wall.The light transmitting side wall comprises at least one groove extending upward from the lower edge.And the light transmitting side wall is butted at the light source outlet.A chamber space is defined between the top wall and the light source outlet.The top wall has a reflecting surface reflecting the light at the outlet of the light source；The mosquito repellent filter is arranged on the side close to the reflecting surface in the light transmitting side wall.The mosquito repellent filter is covered with a filter material layer.It is used to filter light with wavelength less than 500nm emitted from the light source outlet.一種應用於行動光源的驅蚊濾光罩裝置，其具有一光源出口，驅蚊濾光罩裝置包含罩體單元及驅蚊濾光片；罩體單元係可拆卸地卡套於光源出口，其具有頂壁及自頂壁延伸而下的透光側壁，透光側壁包含至少一條由下緣向上延伸的剖槽，並以透光側壁抵接在光源出口，頂壁與該光源出口間定義出一腔室空間，頂壁具有將光源出口的光線反射的反射面；驅蚊濾光片設置於透光側壁內靠近於反射面之一側，驅蚊濾光片披覆有濾光材料層，用以濾除由光源出口發出之光線的波長小於500nm的光。
