Renewable light aggregate solidified soil

The invention discloses renewable light aggregate solidified soil which comprises the following components in percentage by mass: 10-25% of ceramsite, 10-25% of soil, 10-25% of river sand, 10-25% of cement, 10-25% of an additive and the balance of water. The mass fraction of the soil is 10-50%; the mass fraction of the river sand is 25-50%; the mass fraction of the cement is 10-20%; the mass fraction of the water is 10-15%. The lightweight aggregate cement soil is prepared by taking a curing material, sludge and building residue soil as main curing materials, a catalyst and a curing agent as secondary materials and Portland cement, fly ash, ardealite, lithium slag, silicon powder and the like as auxiliary cementing materials, and adding a certain proportion of water. The mixture which has flowability and self-compaction performance and has certain strength and impermeability after being cured is formed, and the mixture can be widely applied to backfilling of fertilizer grooves, foundation reinforcement, backf