The present invention relates to a soil purification facility. A soil purification facility according to an embodiment of the present invention includes: a floatation chamber in which a soil mixture is supplied; A bubble generator disposed in the floatation chamber; And a hydro-cyclone device receiving the soil mixture discharged from the floatation chamber and performing a process of classifying the soil mixture according to one or more of the size and mass of the particles of the soil mixture. The bubble generator may generate bubbles, and the generated bubbles may be floated upward along with the fine soil supplied into the floatation chamber and discharged to the outside.
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