Electrical connection device

An electric connection device comprises an insulating shell, a connector, an insulating elastic shade and a metal ring. A mounting groove is formed in the insulating shell. The connector is arranged in the installation groove of the insulation shell and comprises a needle head. The insulating elastic shade is attached to the insulating shell and is provided with an opening. The metal ring is arranged on the opening of the insulating elastic shade and sleeved on the needle head, the metal ring and the insulating elastic shade are connected in a sealing mode, and the metal ring and the needle head are connected in a sealing mode. The metal ring is provided with an opening for the needle head to be arranged, so that the needle head partially protrudes out of the metal ring. Therefore, the metal ring and the insulating elastic shade can form a good water retaining structure so as to isolate water outside the electric connection device and prevent the water from seeping into the electric connection device. 一种电连接装置