Low-maintenance low-and-middle-speed magnetic suspension three-dimensional adjustable fastener

The invention discloses a low-maintenance low-and-middle-speed magnetic suspension three-dimensional adjustable fastener. The low-maintenance low-and-middle-speed magnetic suspension three-dimensional adjustable fastener sequentially comprises an H-shaped sleeper, an iron cushion plate and a rail supporting table from top to bottom, wherein oblong holes are respectively formed in bottom plates of two sides of the H-shaped sleeper; the iron cushion plate is provided with a first bolt connecting hole and a second bolt connecting hole; the H-shaped sleeper is screwed in the oblong holes and the first bolt connecting hole through T-shaped bolts and is connected with the iron cushion plate; the iron cushion plate is screwed in the second bolt connecting hole through an anchoring bolt and is connected with the rail supporting table; the first bolt connecting hole comprises a T-shaped bolt screwing-in hole and a T-shaped bolt locking hole; and the T-shaped bolt screwing-in hole is positioned above the T-shaped bolt locking hole. The oblong holes are formed in the H-shaped sleeper, so that lines along a rail row can be adjusted in the longitudinal direction, notches are formed in the iron cushion plate and the H-shaped sleeper, the rail row can be adjusted and limited in the transverse direction, and vertical large-range heightening can be implemented through a combination of different heightening cushion plates.