A power distribution connection apparatus comprises a busbar that includes a first frame body and a second frame body, where one end of the first frame body is connected to one end of the second frame body; a fastener that includes a fastening part and a first connecting part, where the fastening part is fitted outside the first frame body or the second frame body, and slides along the first frame body or the second frame body, there is a tooth needle mounting hole on the first connecting part, and the first connecting part and the fastening part are connected on one side of the first frame body or the second frame body; and a tooth needle, where one end of the tooth needle is plugged inside the tooth needle mounting hole, and the plugging depth is adjustable.