NOVELTY - Fabricating solar cell polysilicon raw material using rice hulls comprises: (a) heating rice hulls; (b) activation treatment; and (c) chemical purification treatment.    USE - The method is useful for fabricating solar cell polysilicon raw material using rice hulls (claimed) for producing solar cell panel products.    ADVANTAGE - The method is low in reagent consumption, pollution discharge and production cost; the prepared SiO2 and C mixed powder has particle diameter within nanometer range, and achieves relatively high reaction activity as well as relatively low unit power consumption while being utilized for restoring and refining silicon in an arc furnace.    DETAILED DESCRIPTION - Fabricating solar cell polysilicon raw material using rice hulls comprises: (a) heating rice hulls: crushing the rice hulls, screening 100 meshes and drying; filling the rice hulls in a tubular electric furnace after the water content is between 1% and 2%, firstly performing thermal decomposition and carbonization at low temperature of 500-590 degrees C for 100-180 minutes in nitrogen atmosphere; slowly burning at low temperature of 500-590 degrees C for 100-180 minutes in the air atmosphere so as to produce mixed powder of silicon dioxide (SiO2), carbon (C) and impurities, adjusting the carbon content in the mixed powder at temperature of 500-590 degrees C for 100-180 minutes; (b) activation treatment, rolling the mixed powder prepared in step (a) to prepare the mixed powder containing SiO2, C and impurities, heating in a microwave oven for short time, and performing activation treatment at the temperature of 500-590 degrees C for 5-10 minutes; and (c) chemical purification treatment, performing reflux treatment to the mixed powder prepared in step (b) in oxidizing acid solution at the heating temperature higher than 100 degrees C, sufficiently oxidizing and dissolving majority of impurities in the mixed powder excluding SiO2 and C, filtering the solution, cleaning for three times using high-purity de-ionized water, repeating the purification treatment for three times, drying to make the water content be not greater than 1%, acquiring the mixed powder with high purity and high activation and composed of SiO2 and C, wherein the mol ratio of the SiO2 and C is 1:2.