<p>Enhancing the nonconservative force exerted on the ferromagnetic material is a key strategy for improving magnetoelastic coupling in multiferroic composites. Inspired by the mechanism of pulsed lasers injecting phonons directly into ferromagnetic materials, we propose a method to introduce and amplify phonons by constructing a “phonon channel”. Analyzing the magnon excitation spectrum reveals that magnetoelastic coupling is significantly enhanced with an increasing amplification coefficient <i>A</i>_p of nonconservative force in the phonon channel. When the external magnetic field is parallel to the wave vector of the spin wave, the amplitude of magnons in the anti-crossing region exhibits left-right symmetry with respect to the crossing point. In contrast, when the magnetic field is perpendicular, the symmetry becomes up-down. Introducing a coupling layer into the multiferroic composites provides a viable approach to realizing the phonon channel. Taking a multiferroic composite structure consisting of polyvinylidene fluoride and yttrium iron garnet as an example, we compare the electrical and acoustic properties of multiferroic composites with and without a coupling layer in the microwave frequency band. The enhancement of electrical and acoustic properties confirms the effectiveness of the phonon channel in multiferroic composites.</p>