The invention discloses a removing method for nitrile organic matter in tetrachloroethylene and carbon tetrachloride. The method comprises the steps that 1, 6 kg of an alkaline aqueous solution is poured into a 20 L reaction kettle with sight glass at a discharge outlet, then 60 g of surfactant is placed into the reaction kettle, fluoride temperature is controlled to range from 10 DEG C to 200 DEG C, stirring starts to be carried out, and a feeding device is used for adding a tetrachloroethylene solution with 3-chloroacrylonitrile or a carbon tetrachloride solution with 4-chlorin-butyronitrile into the reaction kettle; 2, after feeding is finished, the reaction continues to be carried out for 30 min, after the reaction is finished, a lower organic layer with nitrile removed is separated out for detection, and residual content of the nitrile is detected. According to the removing method for the nitrile organic matter in the tetrachloroethylene and the carbon tetrachloride, the nitrile matter is removed through a saponification method, the method is applicable to carbon tetrachloride or tetrachloroethylene solutions with different nitrile content, the product quality of tetrachloroethylene can be greatly improved, the method has the industrial prospect, and product quality is effectively improved.