The invention discloses a three-dimensional distributed loudspeaker. The loudspeaker comprises a sound amplifying housing, a loudspeaker body, a telescopic mechanism and a polarization damping piece,the loudspeaker body is arranged at the front end part of the telescopic mechanism through a spring piece; the telescopic mechanism is of a barrel-shaped structure with a hollow middle part and is integrally sleeved in the sleeve in a telescopic manner, a connecting rod is concentrically arranged in the telescopic mechanism, the front end of the connecting rod penetrates through a spring piece atthe front end of the telescopic mechanism and is connected with the tail end of the loudspeaker body, the tail end of the connecting rod is connected to the tail end part of the telescopic mechanism,and the connecting rod is of a telescopic structure; a polarization damping piece is arranged in the telescopic mechanism, and the front end of the connecting rod is arranged in a reserved gap in theend of an elastic rib of the polarization damping piece and connected with the outer wall of the connecting rod when making contact with the elastic rib. According to the loudspeaker, the polarizationdamping piece is arranged in the telescopic mechanism, when the loudspeaker body vibrates, the connecting rod transmits the amplitude to the polarization damping piece, a gap exists in the end of theelastic rib of the polarization damping piece, and the transmitted vibration does not cause secondary resonance.