Because the price of imported LNG was much higher than the domestic price, reducing the export of the LNG terminal station in the off-season to save costs becomes the main task for LNG terminal stations. So the proposal of booster compressor with pressurized gas is adopted by each station for export. But this kind of process change increases the risk of unstable operation in booster compressor and the BOG compressor, and will even cause damages to equipment. So after compared with the operation experience of Tangshan LNG receiving station, we analyze how can various factors affect the equipment vibration such as the load change, then quantify control indexes of parameters, which improves the process safety of upstream and downstream equipment, reduces the risk of injury to the body of the booster compressor. Methods for vibration control under normal and underload conditions and equipment management bave been obtained.