The invention discloses a sewage regulating tank for mine, and belongs to the field of mining machinery. The sewage regulating tank for mine comprises a tank body, wherein a flow direction regulating part is arranged in the tank body for dividing the tank body into a strong stirring region and a weak stirring region; the strong stirring region mutually communicates with the weak stirring region; a second stirrer is arranged in the strong stirring region; a first stirrer is arranged in the weak stirring region; and a flow direction lifting part is arranged below the flow direction regulating part and is positioned on the bottom of the tank body. According to the sewage regulating tank for mine disclosed by the invention, sewage directly discharged by the mine is mixed in the tank body, so that the minerals in the sewage are enabled to be uniformly mixed, and therefore, centralized processing is facilitated, the problem that performing of follow-up reaction is affected as the minerals block parts such as a pipeline as a result of too early precipitation before processing is solved. The sewage regulating tank is simple in structure, is simple and convenient to operate, can be used for effectively mixing minerals in the sewage uniformly, is wide in scope of application, and is suitable for being popularized and applied.