The invention discloses a method for remedying soil contaminated with 2,2',4,4'-tetrabromodiphenyl ether. The method comprises the following steps that agricultural solid waste is mixed with the soil contaminated with 2,2',4,4'-tetrabromodiphenyl ether to obtain a compost raw material; fatty alcohol-polyoxyethylene ether is added in the compost raw material, and a rhodococcus RAH1 strain is inoculated for composting, so that remedying of the soil contaminated with 2,2',4,4'-tetrabromodiphenyl ether is completed. The soil contaminated with 2,2',4,4'-tetrabromodiphenyl ether is remedied with agricultural solid waste, the potential of indigenous microorganisms in the soil is stimulated, the indigenous microorganisms are abundantly bred within the short time, and the activity of the microorganisms is improved; and the RAH1 strain is inoculated, so that the ability of degrading contaminants is improved greatly, and the method has the advantages of being simple to operate and maintain, low in operation cost, and low in environmental risk.