Fourteen inbreds of maize were tested for the tolerance to chlorsulfuron with the method of seedling wa-rnter culter. Significant difference existed in the tolerance of different type maize when tested with 1 and 2 μg/rnkg of chlorsulfuron. The tolerance in different type maize wa dent＞flint＞sugar＞midiem＞super sugarrnpop. The tolerance of different inbred maize was negative correlated with the concentration concentration ofrnchorsulfuron. The tolerance of hybrids might have some relation with their parent lines because in this testrnthe hybrids response to chlorsulfuron showed significant positive correlation with that of tits female parentrnwhich suggented some matal in inheritance and was not controlled by nuclear. It was possible that toler-rnance of maize to chlorsulfuron was cytoplasm inheritance.