Abstract: To better utilize the radiation induced mutation pea offspring, three different types of compound peas were used as material in this study, we purpose to find the determination factors of the yield , multivariate analysis, path analysis and principal component analysis were used in this study. [Result] The results showed that the variation coefficient of agronomic traits of pea M2 by 60Coγ reached 0.171-0.8539, and the yield had a extremely significant correlation with grain number per plant, Pods per plant, podding number, Path analysis shows that the Pods per plant and grain number per plant had a great influence on yield. grain number per plant,Pods per plant, podding number as determinative morphological factors of high-yielding varieties .[Conclusion] The major determining factors of pea yield were grain number per plant, Pods per plant, pod number, and the hundred grain weight should be also given attention as well.