Automatic ink supply system of printer

The utility model relates to an automatic ink supplying system of a printer, comprising ink bottles, a bottle cap, an ink box of a printer, ink, ink outlet, sponge and a transparent hose. The utility model is provided with two ink bottles; bottoms of the two ink bottles are communicated. The ink bottles are arranged on a lifting support frame; lifting plates of the lifting support frame are arranged on the lifting support frame; the lifting plates of the lifting support frame are connected with the lifting support frame by bolts and nuts. The circumscribed transparent hose extends outward from bottoms of the ink bottles; an exit end of the transparent hose is connected with the ink outlet; the ink outlet inserts into the ink box of a printer and inserts into the bottom of the ink box. Based on the cheap and practical ink bottle, the utility model realizes continual ink injection of the printer with controllable and uniform ink outputting. The utility model has a good printing effect.