Abstract: In order to explore the relationship between grain-filling characteristics and high-yield, achieve high yield by cultivation and offer the reference for selecting new cultivars, the grain-filling processes of grain volume, wet-weight and dry-weight, as well as difference of grain-filling parameters, of‘Nongda211’and other 4 cultivars/lines with different kernel weight planted in Beijing area were studied. The results showed that grain volumes and wet-weights of these 5 cultivars appeared to be parabola curve at whole period, meanwhile the maxim and final volumes of‘Nongda211’were near to that of‘Nongda3334’, and higher significantly than that of‘Zhongyou9507’,‘Jing411’and‘Nongda3747’, and the volume of‘Nongda211’increased linearly during 3 days postfloral (DPF) and 24 DPF, then caught up to‘Jing411’,‘Nongda3747’and‘Zhongyou 9507’, and finally were close to‘Nongda3334’. The dry-weight of‘Nongda211’showed“S”curve, and the dry-weights of‘Nongda334’at 21 DPF,‘Nongda211’at 24 DPF, and‘Zhongyou9507’at 27 DPF were higher significantly than those of‘Jing411’and‘Nongda3747’at corresponding DPF. The maxim filling rate (Rmax), average filling rate (R) and time to the maxim filling rate (d) of‘Nongda211’were higher than those of‘Zhongyou9507’,‘Nongda3747’and‘Jing411’, but lower than those of‘Nongda3334’; the filling rates at gradual increasing stage (R1), at rapid increasing stage (R2) and slowly increasing stage (R3) of‘Nongda211’were similar to those of‘Nongda3334’and‘Zhongyou9507’, but more fast than those of‘Nongda3747’and‘Jing411’. In conclusion, the grain-filling processes and of grain volume, wet-weight and dry-weight, and grain-filling parameters of‘Nongda211’approached to‘Nongda3334’, and‘Nongda211’had more spikes/ hm2 and grains/spike, so‘Nongda211’had higher yield than‘Nongda3334’.