The invention discloses a method for degrading chlorobenzene organic pollutants by using a double-liquid-phase system, belonging to the field of organic pollutant treatment. The method comprises the following steps: adding 40-200mg of chlorobenzene organic substances into every 1L of silicone oil until the weight concentration of the chlorobenzene substances in the silicone oil is 40-200mg/L, andstirring and mixing; and adding an inorganic salt culture medium and soil polluted by chlorobenzene organic substances into a container until the polluted soil accounts for 5 wt% of the inorganic salt solution, adding the prepared silicone oil containing the chlorobenzene substances until the silicone oil phase accounts for 30% of the total system in volume, culturing at 30 DEG C in a dark place,and stirring and mixing. The invention can obviously inhibit volatilization loss of volatile organic substances, enhance the bioavailability of hydrophobic organic substances and effectively degrade chlorobenzene organic pollutants.