The melting of micro-/nanoparticles in an alloy melt is investigated by using the asymptotic method. The asymptotic solution of the dynamic model for micro-/nanoparticle melting shows that the melting temperature of micro-/nanoparticles depends on the size, isotropic/anisotropic surface energy, and the initial concentration. As the particle radius decreases, isotropic surface energy reduces the melting temperature and promotes the melting of the particle, whereas the initial concentration enhances the melting temperature and depresses the melting of the particle. Along certain crystal orientations, the anisotropic surface energy reduces the melting speed of the micro-/nanoparticles and enhances the melting temperature of the micro-/nanoparticle, whereas it enhances the melting speed of the micro/nanoparticles and depresses the melting temperature of the micro-/nanoparticles along other crystal orientations. The initial concentration reduces the melting speed of micro-/nanoparticles and enhances the melting temperature of micro-/nanoparticles along all crystal orientations. The result of the asymptotic solution is quantitatively consistent with experimental results.