The invention relates to a drive loop relay protection device of a tripping coil. Specifically, the relay protection device prevents the long-time electrified tripping coil from damage due to mechanical faults, wrong auxiliary switch position and other causes when the tripping coil is controlled to trip and close in a transformer substation. The relay protection device is characterized by comprising seven parts: a data processing unit, a man-machine interaction unit, a Hall sensor, a power relay, a coil drive circuit, a data communication unit, and an alarm output unit. The relay protection device can monitor the working state of a drive current of the tripping coil in real time, breaks the drive loop rapidly when the drive current exceeds a set value so as to prevent the tripping coil from being burned for bearing high current for long, and can store a record of coil action current. The device has a simple structure and is convenient to install.