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As sort of traditional paper process machinery equipments, paper cutting machines are developing rapidly in hydraulic, digital display and computer control machines. But a great number of products of the paper cutting machines in the market are that the pressing paper units are controlled by hydraulic drive and cutting paper units still adopt mechanical driven by worm wheel and worm. These kinds of paper cutting machines have many disadvantages, such as: complex structure, low driven efficiency and low availability factor of hydraulic system and so on. One type of the paper cutting machine with fully hydraulic system both in pressing paper and cutting paper units is studied in detail. The hydraulic system element circuit are delivered and analyzed in detail. The loading and working condition of hydraulic system are also analyzes and calculated; the main parameters of performing elements including the power of motor are confirmed as well. [ABSTRACT FROM AUTHOR]