The invention discloses an automatic riveting device for a connector. The automatic riveting device comprises a machine frame, an automatic riveting mechanism and an operation control mechanism; a supporting plate on the machine frame is fixedly connected to a mounting base plate of the automatic riveting mechanism; the automatic riveting mechanism is surrounded by a cover sealing plate of the machine frame; a button shell of the operation control mechanism is fixed to the machine frame; a rivet pressing air cylinder and a rivet feeding air cylinder of the automatic riveting mechanism are fixedly connected to a riveting pressure cylinder seat and a rivet feeding air cylinder seat respectively; and a turnover air cylinder of the automatic riveting mechanism is fixedly connected to a turnover air cylinder seat, then the whole body is connected to an air cylinder turnover fixing seat through a first cylindrical pin or a first hinge, and a piston rod of the turnover air cylinder is connected to a turnover plate or a second hinge through a connecting head, a fisheye bearing and a second cylindrical pin. The connector body is connected to a buckle, a torsion spring and a rivet and the riveting action can be completed synchronously for one time, the manual operation intensity and the labor cost are remarkably reduced, and a technical module can be laid for standardization and full-automatic production line design.