The utility model relates to a photocatalyst LED tube group of an air purification device.The utility model comprises a light guide tube.A light source module and a photocatalyst reaction piece,A plurality of through holes are sequentially arranged at the opposite ends of the light guide tube along the long side direction.These through holes are divided into m cooling holes and N light guide holes, and M >； 1.N >； 1.M is more selective than,Equal to or less than N；The light source module comprises a flexible substrate and a plurality of LED grains.The photocatalyst reaction piece is woven by glass fiber with photocatalyst material and wrapped outside the light guide tube；Each heat sink has a heat sink aperture.Each light guide hole has a light guide aperture.The luminous angle of each LED crystal is greater than or equal to 90 degrees；Wherein, the photocatalyst LED tube group meets the following relations: the central axis of each first heat sink is parallel to each other；There is a first axial difference between the central axis system of the first cooling hole and the central axis of the first light, and the first axial difference is between 0 mm and 5 mm；The central axis of the first light guide hole and the second light guide hole intersect each other in the light guide pipe and form an included angle of light transmission.The angle of light transmission is between 90 and 120 degrees.Thus, the irradiation angle is increased to improve the photocatalyst reaction area, and the heat dissipation efficiency is improved to achieve the purpose of long-term air purification and sterilization.一種空氣淨化裝置的光觸媒LED燈管組，其包括一導光管、一光源模組以及一光觸媒反應件，該導光管的相對兩端沿其長邊方向依序開設有複數個貫通孔，該些貫通孔係區分為m個散熱孔與n個導光孔 且m＞1、n＞1，m選擇性大於、等於或小於n；該光源模組包含有一可撓性基板與複數個LED晶粒；光觸媒反應件係以具光觸媒材料之玻璃纖維所編織而成且包覆於該導光管外；每一該散熱孔具有一散熱孔徑，每一該導光孔具有一導光孔徑，每一該LED晶粒的發光角度係大於或等於90度；其中該光觸媒LED燈管組係滿足下列關係式：每一該第一散熱孔中心軸與每一該第一光中心軸相互平行；該第一散熱孔中心軸係與該第一光中心軸之間具有一第一軸向差值且該第一軸向差值則介於 0mm ~5mm之間；該第一導光孔中心軸與該第二導光孔中心軸於該導光管內彼此相交且形成一透光夾角，該透光夾角係介於90~120度的範圍。藉此，
