The middle cultivating technology different in three kinds, average WUE of film mulching does average WUE1.26kg/mm for 1.69kg/mm are on the same level comparatively improve 34.13% the utilization ratio of water, average WUE assumes ridge culture for 1.47kg/mm are on the same level comparatively improving 16.67% the utilization ratio of water, Average WUE taking off the poisonous potato is 1.60kg/mm, average WUE not having taken off the poisonous potato is that 1.34kg/mm, the utilization ratio of water improve 19.35%. The tie does the flower bud now cultivating the way potato arrive at 90% or so till the maturation period water requirement takes up the entire child-bearing period; Way ridge culture is cultivated 76.86~83.3%; Way film mulching is cultivated 73.08~77.08%, potato moisture content making use of tends to reasonableness behind ridge culture and film mulching. And being able to after ridge culture makes the film mulching being in progress healthy and strong planting, the nest potato duplicates each other only, the big middle commodity potatos leads height, raises potato's output thereby.