Loudspeaker and sound box

The utility model discloses a loudspeaker, which comprises a vibrating diaphragm body and a vibrating diaphragm dangling edge, and is characterized in that the vibrating diaphragm body comprises a dome part positioned in the central area of the vibrating diaphragm body and a bearing part positioned in the edge area of the vibrating diaphragm body; the vibrating diaphragm dangling edge comprises aninner dangling edge which is arranged around the edge of the outer side of the vibrating diaphragm body, and the bearing part is partially attached to the inner dangling edge to bear the inner dangling edge; the vibrating diaphragm body further comprises a connecting part obliquely extending towards the edge of the dome part, and the connecting part is connected with the outer edge of the dome part; a limiting part is arranged between the connecting part and the bearing part, a voice coil framework is arranged on one side of the vibrating diaphragm body, and the limiting part is used for limiting the position of the