The utility model discloses a reverberation generating circuit, comprising a synthetic stacked circuit. A feedback loop is arranged between the output end and the input end of the synthetic stacked circuit, and is internally connected with a compressing circuit, a delaying circuit, a decompressing circuit and an attenuating circuit in series; the output sound signal of the output end of the synthetic stacked circuit is firstly compressed through the compressing circuit before entering the delaying circuit, then the compressed sound data is transported into the delaying circuit for storing; moreover, after the sound data is delayed for a preset time through the delaying circuit, the delaying circuit outputs the compressed data to the decompressing circuit which decompresses and reverts the compressed data, then performs the attenuation process. The reverberation generating circuit not only reduces the required capability of the memory in the design, but reduces the area of the circuit and the hardware cost, and meanwhile can effectively adapt to the add of the delaying time for the sound.