Abstract: 【Objective】 To study the yield traits of 36 maize hybrid combinations and do a comprehensive evaluation of the rate of grain dehydration at harvest in the hope of selecting the varieties with fast grain dehydration,for the breeding of sports materials of high generation group. 【Methods】 Using 4 maize inbred lines as test species and 9 maize high generation lines as pending test lines, NCII incomplete double-diallel hybrid group was adopted to comprehensively evaluate the correlation, principal component, membership function and cluster analysis of grain dehydration rate and yield characters. 【Results】 The results showed that the order of variation coefficients of various characters in the hybrid combination was as follows:growth period < plant height < ear diameter【Conclusion】 According to the contribution rate of each comprehensive index, based on the comprehensive index of cluster analysis, 7 hybrid combinations with fast dehydration have been selected, which is conducive to mechanical harvest.These excellent combinations have utilization value in breeding.