The hydraulic cylinder used at important occasion requirements more for its cleanness,but the ordinary cylinder tes-ting machine can't meet this requirements. The design points of a cylinder testing machine were introduced. Making full use of the e-lectro-hydraulic proportional control,the automatic adjustment of flow and pressure was realized. So the efficiency of the equipment is improved,the hydraulic cylinder cleanness is guaranteed to the greatest extent,the reliability of the equipment is improved.%使用在一些重要场合的液压缸，安装前除需要进行各种常规测试外，还对液压缸自身的清洁度等级提出较高要求，但普通的液压缸试验台无法保证实验液压缸的清洁度。着重介绍一种液压缸清洗试验机液压系统的设计要点，该系统充分运用电液比例自动控制，较为快捷地实现了试验压力与流量等参数的自动化控制调节，提高了设备的工作效率，最大程度地保证了实验液压缸自身的清洁度等级，提高了主机液压系统的可靠性。
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