The invention provides a method for reducing the VOC content of tail gas produced by a methane chloride device. The method comprises the following steps: the tail gas generated by the methane chloridedevice is introduced from the medium-lower part of a spray absorption tower, and an absorbent is sprayed from the top of the spray absorption tower to absorb VOCs in the tail gas, except hydrogen chloride; the obtained unabsorbed tail gas enters a tail gas buffer tank from the top of the spray absorption tower; the obtained absorbent-rich solution undergoes heat exchange, and then enters a desorption tower through the top to desorb the VOCs in the absorbent-rich solution; the desorbed VOCs overflow from the top of the desorption tower, and enter an organic buffer tank for recycling; and an adsorbent-leach solution obtained after the desorption is discharged from the bottom of the desorption tower by using a pressure difference, is condensed, and enters the spray absorption tower through the top for cycle use. The method effectively realizes the reduction of the VOC content of the tail gas produced by the methane chloride device, and also realizes the recycling of materials in the tailgas in order to ensure the maximum benefit of running of the device.