In order to explore the impact of channel leakage on the soil and groundwater of farmland on both sides of the bank，two typical water delivery processes in summer irrigation and autumn irrigation were selected，and 4 observation sections were set up at 50，150，300 and 500 m away from the channel on both banks of the Dongfeng sub-canal to observe the changes of groundwater depth，ions concentration and soil salinity before and after the water delivery.The results showed that during the autumn irrigation period，the salinity of the groundwater before and after the canal delivery was significantly different (P<0.05).The total dissolved solid(TDS) of the groundwater increased by 33.17% before the channel being lined，and increased by 10.05% after the channel being lined.After the lining of the canal，the change rate of groundwater table depth decreased by 14.89% during the autumn irrigation period，and it decreased by 64.22% during the summer irrigation period compared with that before the canal being lined.Due to infiltration and leaching and ion exchange of irrigation water，the cations in groundwater gradually change from Na+ to Mg2+ and Ca2+，the anions gradually change from HCO3- and Cl- to SO42-，and the water chemical type gradually changes from SO4·Cl-Mg·Na type to HCO3·SO4-Ca·Mg type.The delivery of channel has a great impact on soil salinity with a radius of 50～150 m.The cultivated layer (0～40 cm) soil salt accumulates after delivery，with a salt accumulation of about 0.30 g·kg-1，but the deep soil salt changes a little.The salt accumulation rate of each soil layer during the summer irrigation period are -10.82%，4.48%，-16.22%，respectively，before the channel being lined.After the channel being lined，the delivery efficiency is improved and the leakage is reduced，and the salt accumulation of each soil layer are 10.32%，44.17%，11.86%，respectively.The research results can provide references for regulation of farmland water and soil environment and efficiency utilization of farmland.