Double inflated plastichouse is one of the high efficient energy saving horticultural facilities. It is specially favorable to the areas where solar radiation is rich enough and the coal supply is in shortage or high price. Combining capital investment and running expense, this paper analyzed the total cost between single layer covered plastichouse and double inflated plastichouse. At China's present price condition, the double inflated plastichouse has an obvious advantage comparing to the single layer covered plastichouse when the coal consumption in winter is more than 30 kg/m² for single layer covered plastichouse or glasshouse, which areas are that the accumulate temperature less than 5 ℃ in winter is>-600 ℃. Some construction charactertics and applications as well as the advantages and disadvantages of the double inflated plastichouse were also presented in this paper.