The invention provides a loudspeaker inner core, which comprises a first frame, a first vibrating diaphragm and a first piezoelectric piece, wherein the first vibrating diaphragm comprises a middle part and an edge part surrounding the middle part; the edge part is mounted on the first frame; the first piezoelectric part is fixed on the surface, facing the first frame, of the middle part or the surface, deviating from the first frame, of the middle part; and the edge part is made of aluminum, aluminum magnesium alloy or magnesium aluminum alloy. When the loudspeaker inner core disclosed by the invention works, the edge part made of aluminum, aluminum-magnesium alloy or magnesium-aluminum alloy is moderate in rigidity and small in density, so that the vibration amplitude of the first vibrating diaphragm under the driving of the first piezoelectric piece can be effectively increased, the low-frequency sensitivity of the loudspeaker core is improved, the low-frequency frequency response of the loudspeaker core is improved, and the audio performance of the loudspeaker inner core is improved. The invention further provides a loudspeaker module and electronic equipment.