In order to explore the effects of the porous film mulching in root zone (PFMRZ) on the water infiltration and evaporation of Hetian aeolian sandy soil, three porosity openings (30%, 40% and 50%) and three buried depth (10 cm, 15 cm and 20 cm) of this film, as well as one control without film were set up for the laboratory test to study the characteristics of water infiltration and evaporation of aeolian sandy soil. The test results show that PFMRZ can effectively slow down the infiltration of soil water, with the increase of the buried depth, soil water infiltration rate decreases first and then increases, and the increase of the porosity opening speeds up the soil water infiltration rate. When the porosity opening is 30% and the buried depth is 15 cm, the soil water infiltration rate and leakage reach the minimum. Among the treatments of PFMRZ, the cumulative evaporation of the soil surface of each treatment with the buried depth of 10 cm is significantly lower than that of the control treatment (P<0.05), among which it is reduced by 18.67% compared with the control treatment when the porosity opening is 40%, demonstrating that PFMRZ performs well in suppressing evaporation. The cumulative evaporation decreases first and then increases with the increase of the porosity opening, whereas it increases first and then tends to stabilize with the increase of the buried depth of the porous film. In order to slow down infiltration and suppress evaporation, the suggested technical parameters of porous film for Hetian aeolian sandy soil are 40% porosity opening and 10 cm buried depth.