Some packing materials have been tested contrastively including different brackets, glues for fixing chips, fluorescent powder and glues for mixing fluorescent powder, in order to confirm their influence on luminous decay performance of white LED. It is found out from test that, the efficiency of white LED using copper brackets is higher than iron brackets, moreover, the light decay is lower about 10%. The life of white LED using silver glues is longer than using epoxy resins, but initial luminous flux is much lower by 1/3. Different fluorescent powders have different influence on the luminous decay of white LED. The life of white LED using epoxy resins to mix fluorescent powder is shorter than silica gel, but initial luminous flux is higher about 25%. It can be concluded that, different glues for fixing chips and brackets make the thermal resistance from PN junction to bracket change, solidified temperature is distinct during packing when different glues for mixing fluorescent powder have been used, and fluorescent powders have the phenomenon of luminous decay, all of those affect the white LED' life time. Therefore, the materials should be selected synthesizing many factors during designing and packing, based on the importance of initial luminous flux, light decay and drift of color temperature.