Sealing device of cement raw material vertical mill

The utility model relates to the technical field of vertical mills, in particular to a cement raw material vertical mill sealing device which comprises a vertical mill body, rocker arms are symmetrically arranged on the side faces of the vertical mill body, roller shafts are connected to the ends, close to each other, of the rocker arms, grinding rollers are connected to the ends, close to each other, of the roller shafts, and the grinding rollers are located in the vertical mill body. A sealing frame is arranged at the joint of the rocker arm and the roll shaft and arranged on the side face of the vertical mill body, and a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring are sequentially arranged in the sealing frame from outside to inside. According to the utility model, the sealing ring I, the sealing ring II, the sealing ring III and the sealing ring IV are respectively arranged in the sealing frame, and when the rocker arm drives the roll shaft to rotate, the seal