The invention provides a method for repairing organic contaminated soil through magnetic sludge carbon reinforced electric-chemical oxidation. The method includes following steps: S1, carbonizing sludge to obtain sludge carbon, and adopting magnetite powder to modify sludge carbon to obtain sludge magnetic carbon; S2, adding sludge magnetic carbon into to-be-repaired soil, and stirring well to obtain mixed soil; adopting an electric diffusion mode to add an oxidant into the mixed soil, namely adopting an electric injection mode to add the oxidant (sodium persulfate) into the mixed soil. Sludgemagnetic carbon is utilized to efficiently catalyze sodium persulfate to generate high-oxidability free radicals. The method solves the problems of high energy consumption and secondary contaminationcaused by conventional persulfate activation, and degradation rate of organic contaminants is increased. The method is suitable for both ex-situ repair and in-situ repair and is organic contaminatedsoil repair technology having application prospect.