The present invention discloses a rice starch high-efficient cold sterilization method which can be realized by the following methods: (1) adding sodium hypochlorite into a rice starch slurry; (2) treating the rice starch slurry using ultrasonic wave with an ultrasonic frequency of 400-420 KHz, a power of 400-440 watts and a processing time of 10-12 minutes; (3) treating the rice starch slurry using low pressure jet flow with a treatment pressure of 45-55 MPa; (4) treating the rice starch slurry using ultrasonic waves with an ultrasonic frequency of 480-500 KHz, a power of 620-660 watts and a processing time of 26-28 minutes; and (5) drying the rice starch slurry. The rice starch high-efficient cold sterilization method realizes high-efficient sterilization of the rice starch, reduces the residue of sodium hypochlorite, does not cause gelatinization of rice starch during the entire sterilization process, and helps to maintain the original features of starch.