The invention discloses a method for extracting tea saponin from camellia oleosa seed meal, and belongs to the field of tea saponin extraction. The method comprises the steps that the camellia oleosa seed meal is taken as raw materials to be pulverized and then sequentially subjected to ethyl acetate leaching degreasing and enzyme treating, so that effective ingredients in cells of the camellia oleosa seed meal are fully released; ultrasonic extraction is conducted through cooperation of ethyl alcohol, and urea is utilized to cooperate with dry ice for cooling and recrystallizing, so that tea saponin precipitates; the precipitates are heated, so that residual ethyl alcohol is volatilized and urea is decomposed, and the high-purity tea saponin solid is finally obtained. According to the method, the obtained tea saponin is free of organic solvent residues, the urea can be completely decomposed to be taken away by nitrogen flow after being heated, and the purity of the obtained tea saponin can reach 98% or above.