The invention discloses an ink box connecting pipe enlarging method and an enlarged ink box manufactured with the same. The ink box connecting pipe enlarging method includes the steps that communicating holes are formed in the tail face of an original ink box, corresponding external box bodies are manufactured according to the type of the selected target enlarged ink box, communicating pipes are arranged at the positions, corresponding to the communicating holes, of the external box bodies, the communicating pipes communicate with the interiors of the external box bodies, it is guaranteed thatthe sum of the lengths of the external box bodies and the length of the original ink box is the length of the target enlarged ink box, finally, the communicating pipes are embedded into the communicating holes, an ink cavity of the original ink box communicates with the interiors of the external box bodies, and the enlarged ink box is obtained. The enlarged ink box comprises the original ink boxand the external box bodies. The communicating holes are formed in the tail face of the original ink box, and the communicating holes communicate with the ink cavity in the original ink box. The communicating pipes are arranged at the positions, corresponding to the communicating holes, of the external box bodies, and the communicating pipes communicate with the interiors of the external box bodies. The communicating pipes are embedded into the communicating holes. The type of the ink box is changed, and the ink storage amount of the obtained enlarged ink box is increased compared with the original ink box.