The utility model provides a device based on a single chip microcomputer for removing acids and alkalis of graphite through automatic water washing and belongs to the field of industrial automation. The device can be used for solving the problem that in a conventional process of removing the acids and the alkalis of the graphite, whether the pH value of a washing liquid reaches the standard is manually detected, thus the manpower wasting is caused. The device comprises a single chip microcomputer, a power circuit, a pH value sensor circuit, a temperature sensor, a buzzer, a water pump, a motor, a centrifugal machine and an air scraper, wherein the power circuit is used for supplying power for the single chip microcomputer; the single chip microcomputer is used for thoroughly smashing a part of bonded graphite in a stirring device through stirring paddles controlled by a motor, so that the graphite is fully mixed with water; then, the smashed graphite and a mixed liquor are guided into the centrifugal machine by the water pump to be washed with water, the pH value sensor circuit is used for detecting the pH value of a washing liquid of the graphite washed with water, if the pH value does not reach the standard, the water washing process is automatically repeated; and if the pH value reaches the standard, the buzzer gives out corresponding warning tones, meanwhile and the single chip microcomputer is used for controlling the air scraper to scrape off the graphite, so that the process of removing the acids and the alkalines by water washing is finished.