The hot-melt fiber optic connector adopts the traditional fusion splicing method, featuring low loss, high reflectivity, reliability and stability. The product's tail tube accommodates the fiber protection sleeve, saving space and being particularly suitable for application scenarios with high performance requirements such as equipment room renovation. In the pre-installed quick fiber optic connector, the pre-installed fiber is polished at both ends in the factory. The complete end faces of the two fibers are aligned in the V-groove through the ceramic ferrule, and their end faces are elastically fitted. The fiber is firmly glued in the ceramic ferrule, achieving low-loss conduction of optical signals through the V-groove. It adopts a box-lock structure with good sealing performance, preventing the matching paste from easily flowing out and boasting strong weather resistance. With spiral fastening, it is suitable for the termination of butterfly optical cables and yellow cables.