The invention discloses a method for packaging a white LED light source module, which comprises the following steps: (1) welding a blue light finished product light source on a thermal conductive substrate with a fixed hole; (2) placing a light reflecting plate at the bottom on a support of the blue light finished product light source; (3) preparing a through housing; (4) mixing fluorescent powder with silica gel or resin material, and using screen printing or coating technology for printing or coating the mixture on a transparent medium for preparing a fluorescent powder sheet; (5) mounting the fluorescent powder sheet at the top of the housing; and (6) fixing the housing on the thermal conductive substrate, setting a side light reflecting plate on the periphery of an inner cavity of thehousing, and adopting a fixing part for connecting the housing with the thermal conductive substrate. The method has the advantages of scientific and reasonable properties, simple method, surface light emission, uniform light spots, adjustable color temperature at any time, low cost, convenient replacement, good consistency, convenient scale industrial production, high product qualified rate and high utilization rate of the blue light source. The LED light source realizes the adjustable color temperature, expands the range of applications and can meet the needs of more people.