The present invention discloses a switch cabinet connection and combination apparatus, wherein upper line-in/line-out terminals of a medium-voltage switch cabinet are connected to upper contact boxes via a conductor, and lower line-in/line-out terminals thereof are connected to lower contact boxes via the conductor, and remaining gaps to be insulated are filled with a solid insulating material. The present invention further discloses a method of manufacturing a switch cabinet connection and combination apparatus including the steps of: connecting upper line-in/line-out terminals of a medium-voltage switch cabinet via a conductor to upper contact boxes; connecting lower line-in/line-out terminals thereof via the conductor to lower contact boxes; and pouring a solid insulating material for molding. The present invention realizes high reliability, small volume, and no pollution of the medium-voltage switch cabinet.