Wheat-maize rotation planting pattern is an important farming system in the North-western Plain of Shandong Province. It is critical to know how save water in the wheat-maize rotation pattern. The experiment was carried out from 2001 to 2003 at Yucheng Experimental Station and included eight treatments that were based on irrigations at different winter wheat stages and no irrigations at maize stage, however, due to heavy drought at maize stage, all treatments irrigated 60mm water on July 8 and 90mm water on August 20, 2002. The eight treatments were made up of irrigations at Jointing stage (March 26, 2002), Flag stage (April 15, 2002), Grain filling stage (May 11, 2002) in the 2001～2002 season, and irrigations at Jointing stage (April 8, 2003), Heading stage (May 1, 2003) and Grain filling stage (May 17, 2003) in the 2002～2003 season. Every irrigation water value was 60mm controlled by a water supply meter. Wheat plant density was 2250000 plants per hectare and maize density was 60000 plants per hectare. The rainfall in Yucheng City is mainly distributed on the summer when summer maize was growing. Rainfall, evapotranspiration (ET) and irrigation are the basic factors to study the rules of water consumption. The ET per month changed as a “M" curve which two peaks were located, respectively, in the tassel and anthesis stages of wheat and maize. Furthermore, changes of the accumulation of ET were identical between the two years. With the supplement of irrigation or rainfall, water in soil declined gradually with the crop growth in the winter, but increased in the summer. The water content in 0～130cm soil fluctuated as a “Z" trend and the changes were very significant in the 0～60cm soil profile. The results showed that summer maize and winter wheat had the mutual compensation on the yield and the water use efficiency of the whole year had a negative correlation with irrigation quantity. Results showed that it was feasible to practice irrigations during the winter wheat stage, but no irrigation during the summer maize stage in the field of wheat-maize rotation.