Method for improving saline-alkali soil by adopting thermal power solid waste

The invention discloses a method for improving saline-alkali soil through thermal power solid waste. A planting layer, a water retention layer, an improvement layer, an isolation layer and an original saline-alkali soil base layer are included. The ceramsite or the furnace slag is used as the isolation layer, the problem of alkali efflorescence in saline-alkali soil improvement is effectively solved, industrial solid wastes such as the fly ash and the desulfurized gypsum are used as main raw materials for constructing the soil layer, traditional single soil nutrient and structure improvement is converted into accurate design of the constructed soil layer by synergistically utilizing various solid wastes, and the construction cost is reduced. And the current situation of soil depletion of the saline-alkali soil is changed essentially. Mineral ions and organic substances beneficial to plant absorption and utilization in various solid wastes are utilized to construct a good soil environment, so that'waste treatm