Modern society has an increasing amount of oil consumption. Poor management can also harm water resources. With the scarcity of water, its protection is becoming increasingly important. If waste hydraulic oil from factories is not properly handled and enters water sources, it can cause water pollution. Only when waste hydraulic oil is properly recycled into the environment can water resources be protected from contamination. There are many factories like Tianjin Waste Hydraulic Oil Recycling that are working hard to protect water resources. Since factory machinery will inevitably need to dispose of waste hydraulic oil after some operation, it is necessary to replace it with new oil to ensure normal operation. These waste hydraulic oils cannot be discarded directly during processing and must be recycled. If this occurs, oil will enter water resources, damaging them.