Subsoiling before sowing (PS) is beneficial to improve soil structure and permeable capacity. To explore the effect of PS of winter wheat on soil physical properties and water use efficiency of Summer Maize

field experiment was carried out with traditional rotary tillage as CK. In the study

the soil particle size composition

bulk density

soil compaction

growth index and water use efficiency were observed during summer maize growing stage in north china plain. The results showed that there was no significant difference in soil particle size between PS treatment and CK. During the whole growth period

the soil bulk density of PS decreased by 0.63%～3.85% while the porosity was increased by 0.27%～3.67% compared to CK in 0—40 cm soil layer; Soil compaction of PS was significantly decreased by 37.76% (at 20—30 cm) and 22.26%(at 30—40 cm) compared to CK at jointing stage. In the whole growth period

soil water storage capacity

plant height

leaf area index and dry matter accumulation were all higher than CK. Specifically

the yield was significantly increased by 9.50%

the spike length and grain weight per panicle were increased by 4.18% and 6.50% (p＜0.05)

respectively

and the water use efficiency was increased by 5.08%. Effects of the water saving and yield increasing were significant under PS treatment.