The invention discloses a method for detecting the white rice yield out of husked rice and the whitening rate, comprising the following steps: at first, processing brown rice for different periods of time, acquiring images; then extracting image information, establishing a regression equation between an image parameter and the white rice yield out of husked rice and the whitening rate; then taking rice ground for certain time as a to-be-detected sample, extracting image information; then calculating the white rice yield out of husked rice and the whitening rate according to the regression equation. According to the detection method, the white rice yield out of husked rice and the whitening rate of rice are fast detected in real time after the regression equation is determined.