The utility model provides a central electric substation and pump house arrangement structure in pit in geological fault, belongs to metal underground mine infrastructure construction technical fieldfor reduce landslide and abrupt water treatment in the chamber tunneling process. Its technical scheme is: central authorities' transformer chamber is located the top of fault, and pump house and sumpare located the below of fault, and the pump house is connected with the upper end of sump, and the sump connection roadway is connected to passing the lower part of fault with the sump of fault below down from last, and passageway and pump house right side passageway pass the fault downwards above following the fault on the left of the pump house, are connected with the pump house respectively.The utility model discloses having broken through traditional thinking that central electric substation and pump house were laid, having prolonged sump connection roadway and pump house both sides passageway length, separately arranged central electric substation with the pump house, taked grow section chamber to handle big flood fault fracture zone for small cross section tunnel processing, intractability greatly reduced has improved whole capital construction speed and efficiency, has reduced the construction investment simultaneously.