The utility model discloses a carry out three shaft locatings in space and adjust device of permanent magnet, including the epaxial lower guideway of X, Y axle, Z axle guide rail, step down switching curved boom, direction adjustable joint, magnet suction disc and permanent magnet, through the Y axle guide rail coupling between the epaxial lower guideway of X, be provided with the Z axle guide rail of portability on the Y axle guide rail, the Z axle guide rail sets up the switching curved boom of stepping down of portability, the switching curved boom one end of stepping down sets up the permanent magnet, the device provided by the utility model, realize on a large scale spatial position adjustment and accurate positioning through the guide rail, the direction adjustable joint who leads to turn the corner arm one end again can satisfy magnet magnetism and face the experiment to the space all directions, and the installation space demand is nimble, is convenient for carry on the space magnetic field positioning adjusting device that all directions were adjusted. The device is simple, processing is low -cost, satisfy efficient test demand. The not magnetic conduction aluminum alloy and the preparation of yellow copper processing that can not exert an influence to magnetic field is chooseed for use to the guide rail.