Disclosed is a mini sound box, comprising an audio line, an audio plug, a sound box casing, a loud speaker, a circuit board, and a resonance cavity. The resonance cavity is hollow and is telescopic. The sound box casing comprises a sound box upper casing and a sound box lower casing, one end of the telescopic resonance cavity is connected to the sound box upper casing, and the other end of the telescopic resonance cavity is connected to the sound box lower casing. According to the present invention, the sound box casing comprises the sound box upper casing and the sound box lower casing, so the sound box can be disassembled more easily, and at the same time, the resonance cavity of the sound box is telescopic, so that acoustic quality of the mini sound box is improved in the premise of occupying the same space.
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