The invention relates to a stabilized
soil mixing plant and a stabilized soil backfill construction method in a narrow high backfill area, the stabilized
soil mixing plant is arranged at a flat position near a construction
plant, a slope subjected to slope making treatment is arranged on the periphery of the stabilized
soil mixing plant, and a concrete hardened layer with a high middle and a low periphery and a drainage
system are arranged on the bottom surface of the stabilized soil mixing plant; a
material storage area, a
raw material conveying area, a mixing area and a solidified soil conveying area are arranged in the stirring field, soil excavated from a foundation pit is processed on site in the solidified soil stirring field to be prepared into flow-state solidified soil, the flow-state solidified soil is backfilled into a narrow high backfilling area, a large amount of transfer cost is saved, the
ecological environment is protected, and the construction efficiency is improved. The problems that in backfilling construction, the backfilling area is narrow, the backfilling depth is high, and personnel and machinery cannot conduct construction are solved, the solidified soil has a waterproof effect after being solidified, the hidden danger of leakage of the outer wall is solved, meanwhile, the solidified soil has quite high strength and does not need to be compacted, the tamping procedure is omitted, the construction efficiency is improved, and the construction cost is reduced.