Abstract: In this experiment, 12 Xinmai wheat varieties were used as experimental materials and Xinmai 26 as control, the dry matter accumulation of grains after anthesis was fitted by Logistic equation, and the change rules of parameters at 11 filling stages were analyzed.The results showed that the grain filling process of the tested varieties showed an "S" curve of "slow-fast-slow".The highest dry matter growth of Xinmai 36 was 669.37 kg/hm~2, and the average grain filling rate of Xinmai highest with 52.73 mg/day. Both the time and filling rate of Xinmai 32, Xinmai 35 and Xinmai 38 at different filling stages were as follows: gradual increase period ＞ rapid increase period ＞ slow increase period.There was a complex correlation among the parameters, of which 13 pairs of parameters reached a very significant level（p＜0.01）,and 5 pairs of parameters reached a significant level（p＜0.05）.The changes of grain wet weight, dry weight and water content after anthesis showed that there were differences in grain water regulation at the gradual increasing stage. The dry weight of Xinmai 45, Xinmai 52, Xinmai 58 and Xinkemai 168 increased, while the wet weight and water content decreased at first and then increased while 3 indexes of other varieties increased at all.To sum up, more attention should be paid to the varieties with high filling rate and long duration of rapid increase in the breeding of Xinmai varieties and the improvement of cultivation techniques of new wheat varieties.