The invention provides a substation grounding wire safety intelligent control box comprising a box body which is internally provided with a wiring wheel. A cable wire is wound on the wiring wheel. Oneend of the wiring wheel is fixedly mounted on the inner wall of the box body. The other end of the wiring wheel is coaxially provided with a driving motor. An equipment connection outlet is arrangedon the front end surface of the box body at the horizontal line corresponding to the top position of the wiring wheel. The cable wire can extend out of the box body through the equipment connection outlet. An opening and closing door is arranged below the eequipment connection outlet. An ultrasonic flaw detector is also arranged inside the box body and can detect the quality of the grounding cablewire in real time and ensure the safety of the maintenance operation. The dryer can also ensure the dryness of the box body so as to further improve the storage and working environment of the cable wire in the box body and improve the efficiency of the overall maintenance operation.