Abstract: Based on inter and extra-ventricular experiment data, the effects of irrigation with mulching on the plant living factors, such as water, soil fertility, air and warm were analyzed. Compared with the traditional irrigation, the irrigation with mulching reduces the soil evaporation, saves water, regulates the soil temperature, reduces water infiltration and keeps the soil fertility. The water use efficiency and crop yield increased under the irrigation with mulching. The irrigation method with mulching not only saves water, but also creates proper root ecosystem environment for crop growth.