The invention discloses a quick connector device for a flexible medium-voltage cable. The device comprises a middle socket and two cable terminal plugs, wherein one ends of the two cable terminal plugs are respectively connected to the ends of the two cables, and the other ends of the two cable terminal plugs are detachably connected to the two ends of the middle socket respectively. According tothe quick connector device, through the two cable terminal sockets and the middle socket, a standardized cable connector is achieved, and a connection between a ring main unit and the cable becomes very convenient and efficient; compared with a traditional copper pigtail connection mode, the connection speed of the connector device is increased by tens of times, a problem that the connection efficiency is low in the traditional mode is effectively solved, the on-site rapid connection is realized, the all-weather working environment is adapted, the efficiency of installation and power transmission can be effectively improved, a user complaint rate can be reduced, the connector is normalized, and the device adapts to connections of the cables of different manufacturers and is easy to installand convenient to match.