Mung bean is one of the most important economic crops and traditional crops in Northern Shaanxi Province.Developing drought-resistant mung bean cultivation techniques suitable for regional characteristics is the essential part for optimizing the cultivation models for minor grain crops and improving the regional agriculture.Five treatments were set up,including plastic film mulching on ridge,plastic film mulching on" W"shape ridge,plastic film mulching on whole plot,straw mulching on whole plot and no mulching as control.Comparing soil temperature,water consumption,water use efficiency,plant characters and yield of mung bean in different treatments,the results show that plastic film mulching significantly increased the yield of mung bean and the straw mulching did not.In the three plastic film mulching treatments,plastic film mulching on ridge was the most effective treatment in improving both water use efficiency and yield of mung bean.Owing to its additional simplicity of its installation,the plastic film mulching on ridge should be considered as the first option as the drought resistant cultivation technique of mung bean in Northern Shaanxi Province.