Abstract: In order to explore the influence of the film mulching and soil covering cultivation to the commercial potato yield and economic characters in central Guizhou Province, this experiment used ‘Xuanshu 2’ as the material, studied the influence of the different size potato, the different color of the film and the type of soil covering to the soil warm, the humidity, the number of days of seeding emergence, the commercial potato yield and economic characters. The results indicated that, the film mulching and soil covering cultivation turned out to be useful for temperature-increasing and moisturizing before and during seedling emergence in central Guizhou Province, the soil temperature ratio compared high 0.42-6.84℃, the humidity enhanced 1.64%-18.95%, emerges and maturing quickly. Mid and late seedling emergence could reduce the soil layer humidity and the temperature effectively, specially soil layer humidity reduced 5.93%-6.4% in the mature period, reduced the rotten potato rate effectively, the commercial potato productive ratio comparison increased 25.96%. Using about 30 g the small potato could reduce the seed tuber amount used, reduce the production cost, obtain the maximum economic efficiency. Therefore, using small potato with the white film mulching and soil covering cultivation can effective enhance the commercial potato yield, the economic efficiency is highest.