Abstract: The field experiment that studied the effect of different water quality in alternating using saline and fresh water furrow irrigation on soil salinity in soil profile and corn yield was conducted in Hetao Region in Neimenggu Province,with corn as the material.The results showed that no matter on the summit of furrow or at the bottom of it ,salt in soil profile had no significant difference under fresh water irrigation condition,but salt under other treatments was accumulated,the accumulation degree of which was High mineralization degree＞Medium mineralization degree＞Low mineralization degree＞Fresh water.According to analyse salt in soil profile on the top of furrow in different times.Salt in the top-soil layer(0～5cm)is higher than that in the dense-root layer(0～40cm)and that in 1m layer(0～100cm)at the same treatment.The accumulation degree of salt is High＞Medium＞Low＞Fresh water at the same layer in different treatments. The corn yield under other treatments (Low、Medium and High) reduces by 7.3%、30.3%和50.2% respectively.