Cement modified expansive soil, preparation method thereof and cement modified expansive soil ecological base material

The invention relates to the field of expansive soil slope treatment and ecological slope protection, in particular to cement modified expansive soil, a preparation method of the cement modified expansive soil and a cement modified expansive soil ecological base material. The modified expansive soil comprises the following components: 3%-10% of cement, 1%-2% of ferrous sulfate, 0.05%-0.2% of a water-retaining agent, 0.5%-2% of an organic fertilizer, 3%-10% of peat, 0.05%-0.2% of polyacrylamide and the balance of expansive soil. The water-retaining agent is used for realizing water storage and soil conservation capabilities, the organic fertilizer and the peat are used for realizing fertility, the physical and chemical properties and biological activity of soil are improved, and polyacrylamide is used for promoting the formation of a granular structure of a base material mixture, so that fertility factors such as water, fertilizer, gas and heat are coordinated, and the soil-retaining agent has certain fertilit