The invention relates to an ink box recovery method. An ink box comprises a holding chamber for holding ink, an ink exporting part for supplying the ink outside, and an ink filling port located on a side face of the ink exporting part, wherein a check valve is arranged in the ink exporting part. The ink box recovery method comprises the following steps: (1) breaking unidirectional performance of the check valve through the ink filling port, and enabling the check valve to be a two-way channel; (2) sealing the ink filling port; (3) filling the ink through the ink exporting part. According to the ink box recovery method, the technical problems of complex working procedures and low efficiency of the existing ink box recovery method are solved.