Abstract: The water consum ption of cotton on Linze County in the Hexi Corridor Region was studied by water equilibrium method．The water consumption is 675．5mm ．5 or 6 times of irrigation should be applied for promoting water use efficiency．The growing techniques of cotton with plastic film-cover include short plant，close planting and early seeding．Special early-maturing varieties of upland cotton should be selected．Yield of lint cotton by the cultural method of two plants per bunch with one tall and one short is raised by 74．1％ in mean yield and by 83．1％ in maximal yield compared with that by local traditionally cultural method．