Grinding aid adding device of cement grinding mill

The utility model discloses a grinding aid adding device of a cement grinding mill. Including a first strut, a sliding rod is connected to the first supporting rod in a sliding manner; the ends, awayfrom the first supporting rods, of the sliding rods are fixedly connected with storage boxes. An air cylinder is arranged on the first supporting rod; the output end of the air cylinder is fixedly connected with the sliding rod, a closing ball is arranged at an end opening of the lower end of the storage box, a conveying fan is arranged on the first supporting rod and communicates with a three-waypipe, one end of the three-way pipe communicates with a discharging box, and the end, away from the conveying fan, of the three-way pipe communicates with a cement grinding mill. The utility model relates to the technical field of cement production, through the matching of an ejector rod and a closing ball, the interval opening and closing of a material storage box can be realized, so that grinding aids can be conveyed in