Progressive repair method for soil polluted by chlorinated organic compounds

The invention provides a progressive repair method for soil polluted by chlorinated organic compounds. The repair method comprises the following steps: leaching the organic polluted soil by a water solution containing a bio-surfactant, and distributing most of persistent organic pollutants in the soil into a leaching solution; after finishing leaching, adding microbial degrading bacteria, and realizing the sustainable degradation of low-concentration organic compounds. The residual bio-surfactant cannot perform a negative function on the subsequent biodegradation of the organic pollutants, and can be used as a carbon source and be utilized by microorganisms. The bio-surfactant is used as a leaching agent, the organic pollutants are progressively degraded by a microorganism process, and the problems that the soil polluted by high-concentration chlorinated organic compounds is difficult to repair, traditional bio-surfactant produces residual toxicity, and the like are solved.