The utility model discloses a switch board business turn over line port device, including the port cover, the inner wall fixedly connected with locking board of port cover, the bottom fixedly connected with locking device of locking inboard wall, locking device includes the fixed plate, the equal sliding connection in bottom of fixed plate both sides has locking slide, the utility model relates to a business turn over line cap technical field. This switch board business turn over line port device, through passing through the pivot of connecting plate fixedly connected with in the bottom of locking inboard wall, the fixed plate is through first bracing piece and first stripper plate and extrusion spring fixed connection, can pass in and out line cap and electricity distribution room with electricity distribution room and set up as an organic wholely, tightly passes in and out the line through automatic package behind the business turn over line, plays the effect of preventing the toy, and the material adopts the fire prevention, and the event can play fire prevention for a long time, prevent the toy protects the purpose of the interior equipment of electricity distribution room, very big assurance the security, reduced the unnecessary waste, increased work efficiency.