Magnetoacoustic　emission　(MAE)　holds　great　promise　for　evaluating　the　mechanical　properties　of　ferromagnetic　materials.　To　refine　the　problems　of　the　current　theoretical　and　numerical　models　of　MAE,　a　theoretical　MAE　model　that　considers　the　microscopic　dependence　of　the　hysteresis　properties　is　proposed　in　this　paper.　The　microstructure　(dislocation　density　and　grain　size)　and　the　correlation　of　MAE　jumps　are　considered　and　incorporated　into　the　model.　Then,　the　influences　of　magnetization　parameters　and　microstructure　parameters　on　the　envelope　of　the　MAE　signal　are　analyzed　by　the　proposed　theoretical　model.　The　proposed　theoretical　model　is　then　fully　evaluated　by　simulations　and　experiments.　The　MAE　experiments　are　conducted　on　ferromagnetic　specimens　with　different　hardnesses,　and　the　MAE　signals　with　different　hardnesses　are　simulated　by　inverting　the　basic　parameters　of　the　MAE　model　with　the　genetic　algorithm.　Further,　the　crucial　hysteresis　parameters　of　the　specimens　are　calculated　using　the　results　of　microscopic　measurements　and　the　calculated　parameters　agree　well　with　inversion　results　from　experimental　signals.　The　results　demonstrate　that　the　proposed　theoretical　model　is　valid　for　the　MAE　signal　simulation.　The　trends　of　different　hardnesses　can　be　predicted　by　the　MAE　simulation　signals.　Moreover,　the　model　can　be　used　for　theoretical　analysis　of　the　microscopic　dependence　of　the　MAE　signal.