The invention relates to a white light LED light mixing mode and a prepared lighting device, and belongs to the LED technical field; the white light LED light mixing mode comprises an LED chip, and mixes the light of single phosphor luminescence excited by the LED chip; the LED chip is coated by the single phosphor or transparency packaging glue so as to form package bodies of different colors; the package bodies are welded on a PCB plate with a printing circuit according to certain rules; a multi-branch circuit can control the various color LED luminous intensity; the method can adjust the current output proportion of multi-path drive power supplies, thus realizing color temperature continuous changes of the white light mixed by 4 colors; the lighting device can realize the continuous adjustable output white light with the color rendering index Ra>=95, R9>=90, and color temperature and spectrum from 2700 to 7000K. In addition, the InGaN or GaN series semiconductor chip with stable performance and highly stable phosphor are employed, thus greatly improving the lighting device reliability.