The roller press is a new type of cement energy-saving grinding equipment developed in the mid-1980s. It can fully or partially replace the high-energy-consuming ball mill system and has the functions of less consumables and low noise. It is suitable for new plant construction and can also be used for technical transformation of the old factory. The HPU of the cement roller press mainly controls the size of the roll gap of the roller press to realize the control of the size of the cement particles after rolling.