Connector housing assembly and connector

The invention relates to the technical field of electric connectors, in particular to a connector shell assembly and a connector, the connector shell assembly comprises a connector shell and a locking piece, a mounting groove for mounting the locking piece is formed in the side wall of the connector shell in the thickness direction, and the mounting groove is provided with a side opening for the locking piece to be inserted into the mounting groove in a sliding mode from the side opening; a sliding groove is formed in one of the locking piece and the groove wall of the mounting groove, a sliding table is arranged on the other one, the sliding table extends into the sliding groove to limit the locking piece in the thickness direction of the connector shell, and a limiting structure for limiting the locking piece in the width direction of the connector shell is arranged on the connector shell; the sliding table and the sliding groove can have a large-size overlapped part in the thickness direction of the connec