The invention discloses a sounding device. The sounding device comprises a vibrating diaphragm component, wherein the vibrating diaphragm component comprises a vibrating diaphragm and a plastic supporting element combined at the edge of the vibrating diaphragm; the vibrating diaphragm is of a silicon rubber structure, and is in fixed combination with a supporting element in an injection molding manner; and a combining portion which is in injection molding combination with the supporting element is arranged at the edge of the vibrating diaphragm. The manufacturing method of the sounding device comprises the following steps of: 1, forming an annular plastic supporting element in the injection molding manner through filling plastic material in a shaping mold of the supporting element; and 2, fixing the supporting element, and forming a silicon rubber vibrating diaphragm by filling the silicon rubber material in the shaping mold of the vibrating diaphragm, wherein the shaping mold of the vibrating diaphragm extends to the inner side wall of the supporting element, or on the position of the upper side and/or the lower side wall. The vibrating diaphragm with the structure has excellent consistency, and high product stability; the shaping technology of the vibrating diaphragm is simplified, and the manufacturing process of the product is simplified.