Printing machine ink box

The utility model discloses an ink box of a printing machine, which comprises an ink box body and an automatic feeding device, the ink box body is divided into an upper layer feeding chamber and a lower layer ink storage chamber, and the top and the bottom of the feeding chamber are respectively provided with a feeding port and a discharging port; a partition plate is arranged in the middle of theink storage chamber and divides the ink storage chamber into a floating body cavity in the upper layer and a stirring cavity in the lower layer, an ink discharging hole is formed in the partition plate, a stirring mechanism is arranged in the stirring cavity, and an ink outlet is formed in the stirring cavity. The automatic feeding device comprises a valve body, a valve core and a floating body;the floating body is positioned in the floating body cavity; the valve body is provided with an ink channel in the axial direction of the valve body. A feeding port in the upper end of the valve bodyis communicated with a disc