Quantitative ink adding device for four-color printing machine

The utility model relates to the field of ink adding devices, in particular to a quantitative ink adding device for a four-color printer, which comprises an ink storage barrel and an ink pump, the ink storage barrel is communicated with an ink adding pipe, the ink adding pipe is connected with an ink adding assembly, and the ink adding assembly is used for adding ink to the four-color printer. The ink pump is used for conveying ink in the ink storage barrel to the ink adding assembly through the ink adding pipe to add ink to the four-color printing machine, a liquid level sensor is arranged in the ink storage barrel and electrically connected with a controller, and the controller is electrically connected with the ink pump. The liquid level sensor is used for detecting the liquid level change of ink in the ink storage barrel after the ink pump is started and outputting a liquid level signal, and the controller is used for receiving the liquid level signal and closing the ink pump when the liquid level change