Abstract: In this experiment,four maize inbred lines were crossed with four testers（chang7-2,zheng58,PH4CV and PH6WC）.GCA （general combining ability）,SCA （special combining ability） and population genetic parameters ,were investigated in 7 Characters of yield in maize. The results showed that the hybrids （one of parents was C50-5-14） were relatively easy access to high-yield combination, and proper plant height and shape. Three hybrid combinations （C50-5-14×PH4CV,C50-5-14×Chang7-2,C50-5- 14×Zheng 58） were of higher grain yield and smaller plant height,which could be improved good variety.