Abstract: In the study, the combining ability of 6 newly inbred lines were analyzed with incomplete diallel crossing of NCⅡ method. The results showed that the inbred line of T0121 had higher general combining ability in yield per plant of all tested traits. It was 7.32. For special combing ability, the combinations of T0102×Ji853, T0107×Ji 853, T0121×Qi319 and T0139×Mo17 were 6.80, 9.65, 6.37, 6.32, respectively. For the comprehensive performance between general combining ability and special combing ability, there is a good application prospect for inbred line T0121 and combination T0121×Qi319.