The invention discloses an inserting core 
butt joint device of a connector. The inserting core 
butt joint device includes a base; a sliding rail is arranged on the base; a sliding block for holding anoptical 
fiber is arranged on the sliding rail; a fixing module is hinged to one side of an upper surface of the sliding block; a 
fiber pressing 
assembly for controlling an 
optical fiber head to expand and a vertical fine adjusting 
assembly for fine-adjusting expansion of the 
optical fiber head are arranged on the front end of the sliding block; a 
tail baffle is arranged on the 
tail end of the sliding block; a back and forth movement 
assembly for controlling back and forth micro movement of the 
optical fiber is arranged on a horizontal side of the sliding block; and the 
fiber pressing assembly, the vertical fine adjusting assembly, the 
tail baffle, and the back and forth movement assembly are fixed on the base. The functions of butt-jointing the inserting core, fixing a line 
skin, fixing an optical fiber ribbon, and fine-adjusting a position of the optical fiber ribbon, of a plurality of tools are combined together, the inserting core 
butt joint device is easy to operate and move, cangreatly improve the production efficiency, will not affect the position of the butt-jointed optical fiber ribbon during movement, can precisely fine-adjust the optical fiber, can ensure the product quality, can improve the yield of the product, and can improve the production efficiency.