A follow-up air-floating magnetic frictionless suspension device, including an installation frame, a moving beam, a guide rod, an air flotation system and a magnetic system, the air flotation system includes two frictionless cylinders, two air storage tanks, no The friction cylinder is connected to the air pipe, precision pressure reducing valve, and air intake pipe; the magnetic system includes a long-stroke moving coil and an exciter iron core; two friction-free cylinders are symmetrically installed above the bottom plate of the installation frame, and the friction-free cylinder The frictionless cylinder is connected to the air pipe with the air storage tank. The compressed air source is connected to the air storage tank through a precision pressure reducing valve and the air source intake pipe. The piston rod of the frictionless air cylinder is connected to the moving beam through a connecting hinge. The air bearing is installed on the guide rod, the guide rod is fixedly installed on the installation frame, the air path in the moving beam is connected to the air bearing, and a suspension rod is fixed below the moving beam. The invention can also meet the frequency criterion at the time of ultra-low frequency, the additional mass is small enough, the non-linear influence is small, and the test precision is high.