Connector convenient for field assembly

The invention discloses a connector convenient for field assembly, which comprises a locking piece, a guide piece, a connecting piece, an inner core assembly, a shell, a limiting piece, a connecting nut, a tail cap and a protective tail sleeve, and is characterized in that the locking piece is sleeved outside the guide piece, the outer side of the guide piece is provided with a first annular boss, the first annular boss is clamped with the locking piece, the guide piece is internally provided with a second annular boss, and the second annular boss is clamped with the second annular boss; specifications of the locking piece, the guiding piece and the connecting piece can be adjusted, the front end of the limiting piece is sleeved with the rear end of the connecting piece, the front end of the connecting nut is in threaded connection with the outer side of the rear end of the connecting piece, the rear end of the connecting nut abuts against the limiting piece, and the outer side of the rear end of the limiting