Pneumatic brake fluid filling device

The invention relates to a pneumatic brake fluid filling device, and belongs to the technical field of vehicle maintenance. The device comprises an air filter, a speed control valve, a pressure meter, a vacuum negative pressure device, a logic controller, a magnetic sensor, a low-liquid level alarm, a waste oil collection bottle, a pneumatic pump, a filter, an overflow valve, a pressure regulating valve, a reversing valve and the like. The device is the first precedent of pneumatic brake fluid filling in China; brake fluid is pumped for drainage and filled by virtue of compressed air for the first time, so that a series of functions of filling, pumping drainage, alarming and the like can be realized without a power supply, the device is particularly significant for a dangerous environment such as a vehicle maintenance workshop filled with gasoline molecules, the maintenance operation safety can be improved to a great extent, and meanwhile, the requirements of a user on working efficiency are taken into consideration.