Abstract: Rapid determination of castor seed oil content, quality traits, and shorten the time of purchase inspection used in this Perten DA7200 near-infrared analyzer determination of near-infrared spectral values of the ricin samples. And the castor oil content of the samples determined by conventional chemical analysis methods, and the two fit the calibration model, these two fit to establish the calibration model. The results showed that: The oil content of was 0.9655, the deviation of the calibration equation was 3.913e-06. Prove the predictive capability of the calibration equation was excellent, can use it to replace the traditional measuring method for the determination of castor oil content of castor site acquisition.