Miniature loudspeaker

The utility model discloses a miniature loudspeaker, comprising a housing and a sound production unit, the housing comprises an upper housing and a lower housing which are combined in a covering manner, an annular retaining wall is arranged in the lower housing, a bearing step is arranged in a cavity enclosed by the annular retaining wall, the sound production unit is borne on the bearing step, and the miniature loudspeaker also comprises a sealant. And a gap between the top end of the annular retaining wall and the sound production unit is filled with the sealant. The sealant arranged betweenthe annular retaining wall and the sound production unit improves the sealing performance of the miniature loudspeaker and blocks the gap between the sound production unit and the lower shell, so that the sound absorption material is prevented from entering the cavity along the gap, the loudspeaker is prevented from being damaged, the good acoustic performance of the miniature loudspeaker is guaranteed, and the service l