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Because seeding techniques about ordinary plastic film in dry lands are of their respective defects including flat plastic film and mounds film, increased outputs of foxtail millet are limited. For this reason on the basis of composite techniques including wavy water-permeability plastic film of 1650 mm width and the film planter of 2MB-1/4 type, contrastive experiments are carried out in the dry flat area of sandy loam of HongAiZi village in Shenchi County of Shanxi Province during two years, whose characters are 39°30′ N and 1400 m altitude for the situation, 125 d for the frost-free period, 2800 h for the annual sunshine duration and 450 mm for the annual precipitation. As a result millet outputs are improved efficiently and reach to 8840.33-9745.07 kg·hm -2 , whose additional percentage is 101.24%-118.44%. After relative physical, chemical and biological indexes are investigated, measured and analyzed, main reasons of abundant outputs because of this technology are obtained, which are additions of cumulative soil temperatures, high utilization ratios of soil moisture and fertilizer, superiorities of microbial environments, rationalities of millet group structures, high emergence ratios of millet seedlings and so on.