Abstract: Field experiments were conducted to study multiple cultivated technologies for super high yield of summer maize at Huanghuaihai Region with an elite hybrid Xundan 20, which has high and stable yield, multiple resistances and compact structure. Planting density, yield components, agronomic traits, leaf area index and group leaf area duration were analyzed in the study, the results showed that Xundan 20 had long trimness in high density. The high value of leaf areas kept over 60 days, and the effective illumination hours（PAR_Avg≥300mmol/s/m2）were over 780 hours in the whole developing stage. Through the multiple agricultural technology usage, the yield of summer maize in this experiment was above 15000kg/hm2 in 2005 and 2007.