The invention discloses an ink discharge method and device for an overlap orifice region of a jet nozzle and a storage medium, and relates to the technical field of ink-jet printing. The overlap orifice region corresponds to a first column of overlap jet orifices and a second column of overlap jet orifices; the method comprises the steps of separating printing data of the overlap orifice region into first overlap ink discharge data and second overlap ink discharge data; controlling the first overlap ink discharge data to discharge ink from the first column of overlap jet orifices; and controlling the second overlap ink discharge data to discharge ink from the second column of overlap jet orifices. According to the method and the device, the printing data of the overlap orifice region is separated and is distributed to the first column of overlap jet orifices and the second column of overlap jet orifices corresponding to the overlap orifice region, and thereby, each overlap orifice hasthe probability of discharging ink, the problem that the amount of the ink in the overlap region is large due to the presence of the overlap orifices, or the overlap orifices are blocked due to the fact that the ink is not discharged for a long time is avoided, and the service life of the jet nozzle is prolonged while printing quality is improved.