Combine of the actual situation of the Bashang cold upland region which has a big demand of irrigation water, seriously shortage of water resources, lots of water-saving irrigation modes coexistence. Take the case of Shangyi County, the cost and benefit of radish, lettuce and cabbage under irrigation modes of drip irrigation under plastic film, sprinkler irrigation and tube irrigation in this county were analyzed, then made a comparison among them, the results of the comparative analysis revealed that the most economical irrigation mode was drip irrigation under plastic film. In addition, the social and economical benefits of saving water, saving labor, increasing product, saving fertilizer and saving land what generated under this irrigation mode were discussed.%结合坝上高寒地区的灌溉需水量大、水资源短缺严重、多种节水灌溉方式并存的实际情况,以尚义县为例,分析了该县种植的白萝卜、生菜、大白菜分别在膜下滴灌、喷灌、管灌的灌溉方式下的成本和效益,并对它们进行比较,得出该地区最具有经济效益灌溉方式--膜下滴灌.并对该灌溉方式所产生的节水、省工、增产、节肥、节地的社会经济效益加以论述.
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