<p>Although laser cladding technique plays an important role in metal or alloy coatings at present, element segregation and uneven microstructures always exist in the laser cladding layers, which can decrease their mechanical properties and corrosion resistance. To resolve these issues, we designed a synchronous rotational magnetic field device coupled with the laser head in which a synchronous rotational magnetic field can induce Marangoni convection driven by surface tension and horizontal circulation driven by Lorentz and magnetization forces to stir the melt pool. Iron-based cladding coatings were prepared on 42CrMo substrates by changing the magnetic field strength and rotational speed, and the influence of the synchronous rotational magnetic fields on the geometric characteristics, microstructures, mechanical properties, and corrosion resistance of the cladding layer was investigated. Under the magnetic fields, the compositions of the coatings can distribute homogeneously due to the enhanced convection in the melt pools causing uniform element diffusion, and the coarse dendrites can be broken, resulting in the more uniform and dense cladding layers. These features can make the cladding layers have more excellent corrosion resistance. Correspondingly, their hardness and wear resistance can be improved. When the magnetic field strength is 20mT and the rotational speed is 64&#xa0;r/min, its microhardness is up to 864.04HV_0.2, and its average friction coefficient is 0.2687. Consequently, the cladding coating with better performance can be obtained under a certain synchronous rotational magnetic field. This provides a new way for manufacturing iron-based cladding coatings with an excellent wear and corrosion resistance.</p>