The invention aims to provide cement component powder grinding equipment, and aims to solve the problems existing in the prior art. The equipment comprises a rolling disc, a weight bearing disc, a weight bearing foundation and a rotary driver, wherein the rolling disc, the weight bearing disc, the weight bearing foundation and the rotary driver are sequentially arranged in a supporting frame in adownward stacked mode, and the rotary driver is connected with a gear pair and used for driving the grinding disc; the gear pair comprises a first gear ring and a second gear ring, wherein the first gear ring and the second gear ring mesh with each other in an oblique-teeth mode, the upper side of the first gear ring is connected with an adjusting device, and the lower side of the second gear ringis connected with a supporting device; and the lower surface of the grinding disc is provided with a rolling surface which is outwards stepped down in the radial direction, the upper surface of the weight bearing disc is provided with a weight bearing surface which is outwards stepped down in the radial direction, the rolling surface and the weight bearing surface are combined to form a powder grinding cavity, and the vertical height of the powder grinding cavity is gradually reduced from the center to the outside. According to the cement component powder grinding equipment, cement componentscan be fully ground in single equipment until the final required particle size is directly output, and meanwhile the particle size of produced objects is conveniently adjusted according to productionrequirements so that the equipment cost can be reduced, and economic benefits can be improved.