Corrosion-resistant protective device for metal pipelines along subway

The invention discloses a corrosion-resistant protective device for metal pipelines along a subway. The corrosion-resistant protective device comprises two insulating parts and a protective cover, a box body; the driving device is arranged on the box body and is used for driving the box body to move back and forth on the insulating part; the two cleaning devices are arranged on the box body and used for removing corrosives on the outer wall of the metal pipeline; the two pressure sensors, the time relay and the controller are respectively arranged on the box body; and the power supply device is arranged on the box body and is used for supplying power to electric equipment. No current passes through the device, so that the device does not generate electrocorrosion, and the service life of the device is prolonged; the cleaning device can move back and forth on the metal pipeline to remove corrosives on the outer wall of the metal pipeline, the effect is good, the bent position can be cleaned, and practicability