The invention relates to the field of cement production and processing, in particular to an ultra-fine grinding system for cement production, which includes a support frame and a grinding barrel, and the grinding barrel is sequentially provided with a feeding channel, a shutter mechanism, and four sets of coarse grinders from top to bottom. The crushing mechanism, the fine grinding mechanism, the reverse grinding drive mechanism and the feeding trough, the shutter mechanism includes several movable plates that can be opened and closed, the coarse grinding and crushing mechanism includes grinding rollers that can rotate, the coarse grinding and crushing mechanism and the fine grinding mechanism A screening plate is installed horizontally between the grinding mechanisms, a base is fixed horizontally under the supporting base, the reverse grinding driving mechanism includes a rotatable driving gear and a transmission rod, and a funnel blanking rack is provided at the top of the feeding channel. The shown ultrafine grinding system for cement production can perform a series of operations such as feeding, heating, crushing, and ultrafine grinding through the grinding barrel, which reduces the production process, greatly improves work efficiency, and reduces manual labor intensity. Reduced production costs.