The invention discloses a code spraying printer for a plastic packaging box and capable of facilitating ink adding, and relates to the technical field of packaging box code spraying. In order to solvethe problem that dual faces cannot be subjected to one-time code spraying, the code spraying printer is specifically characterized in that a height adjusting mechanism is mounted on the outer wall ofthe top of a base, two parallel side plates are mounted on the top of the height adjusting mechanism, conveying mechanisms are arranged on the inner walls of the two side plates, two induction code spraying mechanisms, turnover mechanisms and positioning mechanisms are mounted on the tops of the side plates, an ink bucket is fixed to the outer wall of the top of the base through a bolt, the outerwall of the top of the ink bucket is fixedly provided with a bucket cover through a bolt, the outer wall of one side of one side plate is fixedly provided with a control main board through a bolt, each conveying mechanism comprises a conveying motor and a conveying belt, the two induction code spraying mechanisms and the turnover mechanisms are mounted, the two induction code spraying mechanismscan carry out self-induction code spraying, in cooperation with the turnover mechanisms, one-time dual-face code spraying can be achieved, the process procedure can be saved, and the code spraying efficiency can be improved.