NOVELTY - New technology for preparing solar energy level poly-silicon, comprises: (a) heating with voltaic arc produced by graphite electrode, preparing metallurgical silicon by reducing silica; (b) flocculation refining, barium salt refining, flux refining, leading in argon and oxidation refining; (c) crashing congealed metallurgical silicon, applying hydrochloric acid and hydrofluoric acid leaching; (d) molybdenum rod rotating silicon liquid to promote crystallization, vacuum refining and degasification purifying; and (5) directional freezing silicon liquid and cutting off two ends.    USE - The new technology is useful for preparing solar energy level poly-silicon (claimed).    ADVANTAGE - Compared with the traditional technology such as Siemens process and improved Siemens process, the invention it has rich raw material source; the investment of permanent assets is only one third and is available for batch investment; and it can save 20-25% of energy and reduce 20% of cost. Moreover, the raw material is silica that is easier to get; it is environment-friendly without using chlorine.    DETAILED DESCRIPTION - New technology for preparing solar energy level poly-silicon, comprises: (a) heating with voltaic arc produced by graphite electrode in electric arc furnace, preparing metallurgical silicon by reducing silica with carbon; (b) flocculation refining, barium salt refining, flux refining, leading in argon and oxidation refining in finery; (c) crashing congealed metallurgical silicon, applying hydrochloric acid and hydrofluoric acid leaching; (d) molybdenum rod rotating silicon liquid to promote crystallization under vacuum condition, vacuum refining and degasification purifying; and (5) directional freezing silicon liquid and cutting off two ends. An INDEPENDENT CLAIM is a metallurgical silicon obtained in smelting having bar shape, comprises (ppm) iron (Fe) (130-140), aluminum (Al) (less than 50), calcium (Ca) (less than 50), phosphorus (P) (less than 10), carbon (C) (less than 4 ppm), boron (B) (less than 10), and 99.98% silicon is 99.98 percent; where the ratio of silica, oil coke, and charcoal is 100:30:22; the reducing temperature is 1700-1750 degrees C; the flocculating agent comprises silicon dioxide (SiO2) (40-80), sodium oxide (Na2O) (5-60), calcium oxide (CaO) (10-40), agitating for 30 minutes at 1550-175 degrees C; adding amount of the flocculating agent is 3-10% of weight of the silicon liquid; the ratio of barium carbonate (BaCO3) and barium hydroxide (Ba(OH)2) is 1-3:1; the adding amount of the barium salt is 1-5% of the weight of silicon; agitating for 30 minutes at 1550-1750 centigrade; and leading in argon for 30 minutes, and leading in oxygen of 25 kPa for 0.5-3.5 hours.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow process of the new technology for preparing solar energy level poly-silicon (Drawing includes non-English language text).