<p>Laser cladding is a metallurgical technique that is distinguished by its rapid heating and cooling characteristics. This method offers several advantages, including a minimal heat-affected zone, limited deformation, reduced dilution rate, and enhanced metallurgical bonding. Consequently, it significantly improves the surface wear and corrosion resistance of components. However, the marked differences in thermophysical properties between the base material and the nickel-based tungsten carbide (WC) powder can lead to the formation of microscopic defects, such as cracks, porosities, and compositional segregations, within the cladding layer. To mitigate these defects, the application of an alternating magnetic field to modulate the laser cladding process has attracted considerable research interest both domestically and internationally. In this study, a multi-field coupled numerical model for the WC60 laser cladding process, augmented by an alternating magnetic field, was developed and validated through numerical simulations and experimental methods. It aims to elucidate the mechanism by which the alternating magnetic field influences the cladding process. Furthermore, the model comparatively analyzes the transient evolution of the temperature and flow fields of the molten pool during the laser cladding process under varying magnetic induction strengths. The findings indicate that the molten pool in the cladding process is subjected to a Lorentz force that fluctuates periodically with the alternating magnetic field. As the magnetic induction strength increases, the temperature of the coating melt pool decreases slightly, while the flow rate increases. The peak flow rate oscillates in response to the magnetic field, and the influence of the alternating magnetic field becomes increasingly pronounced with higher magnetic induction strengths.</p>