The invention aims to provide a magnetic base capable of moving in optional directions in a plane. The magnetic base comprises a magnetic wheel drive mechanism, a magnetic wheel turning mechanism, and a magnetic fixing mechanism. The magnetic wheel drive mechanism uses meshed bevel gears to achieve motion transmission between a hand-operating drive shaft and a horizontal magnetic wheel axle. The synergy turning of the magnetic turning mechanism is completed by four pinions meshed with the same bull gear. Due to the fact that the four pinions are identical in size, turning of the four pinions keeps consistent during turning, and the moving direction of the whole base is determined. The magnetic fixing mechanism is characterized in that a hand-operating wheel drives a worm gear and a worm to drive magnet racks to swing, and the synergy swing of the two magnet racks is completed by a pair of chain drive sprockets and a pair of meshed gears. The magnetic fixing mechanism forms a self-locking mechanism and completes the synergy rotation of the two magnetic racks. The magnetic base is suitable for being used as an engineering machinery base working on the surfaces of iron materials.