The experiment was conducted at Yucheng Comprehensive experimental station of CAS to study water consuimption characteristics in straw mulching winter wheat field under different irrigation conditions. The results showed: that straw mulching could raise penetrate abilities of irrigation water. With irrigation quantities increased, straw mulching could reduce deep SMBS consumption. Water consumption density was evidently increased after irrigation. After getting up of winter wheat, water consumption density of mulched treatments were much higher than those of without mulched treatments. From planting to getting up growth stages, evaporation quantity of mulched treatments were higher than without treatments 52.25 mm. After getting up growth stage, consume water quantity in different growth stages of mulched winter wheats were higher than those of without mulched, but there were not obviousely differences of total consume water quantity between mulched and without mulched treatments.