The presence of bubbles will affect the cleanliness of the oil, reduce the lubrication performance, affect the normal operation of mechanical equipment, and may also cause cavitation and damage the equipment. The bubble removal device uses the centrifugal separation principle of liquid. When the pressurized liquid is input tangentially, it rotates and flows in the conical cavity, and centrifugal separation occurs between the gas and the liquid. The gas gathers toward the center and causes an axial gas pressure difference as the liquid flow rate increases, causing the gas to flow toward the top of the cone and be discharged from the exhaust duct to achieve rapid degassing.