Abstract：In this paper,principal components analysis is applied to study the induced effects of 60Coγray on Amorphophallus Konjac.The 3 independent principal components could be synthesized from orignal data of 20 characters,and the accumulative contribution rate to variance is 96.3%.The principal component could be explained as factor of agronomy traint and cytology,factor of resistance and quality,and factor of enzyme activity, respectively.The equations of principal components are also established.According to biological analysis and breeding practice,the second principal component is expectative induced effect factor,which would be regarded as parameter of Amorphophallus Konjac irradiation,because it reflects induced mutation breeding goal.In 7Gy treatment group,the value of second principal component is 8.34,which is the biggest in the experiment, and the values of first and third principal components are moderate,therefore it is optimum irradiation treatment.