Pretreatment pond for rainwater regulation and storage

The utility model relates to a pretreatment pond for rainwater regulation and storage, which is characterized in that a water outlet communicated with a downstream water body is arranged on a side slope, a water distribution gabion wall is arranged in the water outlet along the transverse direction, the height of the top surface of the water distribution gabion wall is the same as the height of the highest water level of the pretreatment pond, and a gabion layer is paved on the side slope. The device has the functions of accumulating and slowing down the flowing speed of incoming water (mainly urban rainwater), can absorb urban rainwater, relieve the risk of urban waterlogging and improve the flood-fighting capacity of cities, can effectively remove large-particle pollutants in the incoming water in a precipitation mode, purify water quality and prevent water from being polluted after the large-particle pollutants converge into a river channel, and has the advantages of being simple in structure, convenient t