The utility model discloses an eccentric working barrel for injecting chemical agents to an oil tube. The eccentric working barrel is designed for purposes that the injection of the chemical agents inside the oil pipe is achieved and the corrosion of a pipe column is solved and the like. A throwing-pulling type eccentric structure working barrel is adopted, the eccentric working barrel is connected with a well completion pipe column through an upper joint and a lower joint, a chemical agent injection pipeline is connected with a high voltage hard pipeline through an adapter joint, so that the chemical agents can enter into the oil pipe through the high voltage hard pipeline, a pipe joint and a chemical agent injection valve. According to the eccentric working barrel for injecting the chemical agents to the oil tube, when a chemical agent injection valve parameter is needed to change or the injection valve failure is eliminated, with the help of an eccentric structure of a working barrel, under the condition that the pipe column is not opened, the throwing-pulling replacement of the injection valve can be achieved through the steel wire operation, the operation is convenient, quick and low in cost, and problems of the corrosion, wax deposition, salt deposition and scaling deposition of the pipe column and the like can be properly solved.