Conservation tillage is one of the most important agricultural management measures on soil water conservation and crop yield increments. Based on long-term experiment during 2011 to 2016, effects of different tillage treatments, including conventional tillage, no-tillage and subsoiling treatments, on soil water condition, crop yield and water use efficiency were analyzed. The results showed that the average and relative soil water conservation rate was 7.3% and -0.68% at jointing stage of winter wheat under no tillage and subsoiling treatments, respectively. Compared with conventional tillage, soil water storage significantly increased in 0-60 cm soil layer at jointing stage of winter wheat under no-tillage. Besides, the mean values of soil water content significantly increased in 0-100 cm soil layer at jointing, flowering, filling, and harvesting stages under no tillage treatment while that was not significantly increased at jointing stage under subsoiling treatment. Furthmore, no-tillage treatment significantly increased the yield and water use efficiency of winter wheat, especially in the dry years. Therefore, soil moisture conservation ability and yield increment of no tillage was better than that of the subsoiling treatment in dry years.
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