Mine water pretreatment system

The utility model relates to a mine water pretreatment system and belongs to the field of water treatment. The mine water pretreatment system comprises a pre-sedimentation regulating tank, a coagulation reaction tank, a secondary sedimentation tank and a clear water recycling tank which are sequentially connected through pipelines, and the clear water recycling tank is provided with a water outlet for recycling or discharging effluent; the coagulation reaction tank is sequentially divided into three cells from water inlet to water outlet, and each cell is provided with a medicament adding port and a reaction stirrer; the upper part of the secondary sedimentation tank is provided with a honeycomb type inclined tube filler, the bottom of the secondary sedimentation tank is provided with a conical mud bucket, an outlet pipeline of the conical mud bucket is sequentially connected with a mud-sand separation tank and a dense medium storage tank, a homogeneous stirrer is arranged in the dense medium storage tank, an