Abstract: The materialsvere the popular wheat variety in Henan and the cultivars bred by Luoyang Agricultural Sciences Academy, which had been analysiced the parameters of grain filling in logistic. It shows that, for all varictys, coefficient of variation of T3 and R3 is big. It is same to spring characteristic wheat, and overage grain filling velocity is relatively stable, for spring characteristic wheat is same with Tmax and T. For semiuinter variety, the coefficient of variation of T3 and R1 are big, but T and R is on opposite. Studied on the relations between grain filling parameter and grain weight in correlated character, it shows that, for all variety, the key facters to effect grain weight are Rmax, R and R2; for spring characteristic wheat, the grain filling parameter to have extremely correlation for grain weight are Rmax and R2; for semi-winterness, R is extremely relative to grain weight.