By comparison operation parameters of the screw refrigeration compressor with its designed values, reasons for deviation caused by running parameters, effect of exhaust temperature on separation efficiency of oil separator of compressor are discussed, compressor damage is due to bad lubrication. 通过对螺杆制冷压缩机组运行参数与设计值的比较,分析了运行参数形成偏差的原因、排气温度对压缩机油分离器的分离效果的影响,压缩机损坏的原因为润滑不良。