Precise positioning joint of duct piece embedded connector

The utility model relates to a precise positioning joint of a duct piece pre-embedded connector, which is characterized in that a mounting base and the connector are in butt joint, a positioning column is formed on the mounting base, a connection interface is formed at the end part of the connector, the precise positioning joint comprises a joint body provided with a first butt joint end part and a second butt joint end part, and the first butt joint end part and the second butt joint end part are in butt joint. A positioning groove matched with the positioning column is formed in the first butt joint end, the connector and the installation base are arranged in a spaced mode through the first butt joint end, and the second butt joint end is matched with the connection interface in an inserted mode and forms axial or/and radial acting force of the connection interface to abut against the inner wall of the connection interface. The center line of the positioning column coincides with the center line of the conn