The invention discloses a method for removing 4-methylimidazole in a caramel pigment. The method comprises the steps of: preparing into a water solution by using the caramel pigment, regulating the brix and a pH value, placing in an electric adsorption device, and applying a voltage for electrically adsorbing to remove 4-methylimidazole. According to the method, the technical difficulty that the content of 4-methylimidazole in the caramel pigment of an ammonia process exceeds the standard is effectively solved, and the quality and the food safety of the caramel pigment product are improved. Compared with a currently common treatment technology, the method disclosed by the invention has the advantages of simplicity and convenience in operation, low cost and the like, and can be performed repeatedly.