Cable plug connector for photovoltaic system

The invention relates to the field of cable terminals, in particular to a cable plug connector for a photovoltaic system, which comprises a first connecting sleeve, a second connecting sleeve, a cable joint, an external quick change mechanism and a sleeve internal connection mechanism, the second connecting sleeve is arranged on one side of the first connecting sleeve, the external quick-changing mechanism is composed of an annular chuck and three sets of bayonet lock assemblies, the three sets of bayonet lock assemblies are fixedly arranged on the other side of the first connecting sleeve in an annular array shape, and the three sets of bayonet lock assemblies and the annular chuck are all arranged in a clamped mode; according to the invention, the cylindrical inner sleeve and the cylindrical outer sleeve are in sliding fit, and a sliding buffer structure between the multiple rollers and the pin contacts is additionally arranged, so that the cable terminal connection device is safe and efficient, and the rel