Fused fiber splitter (fused fiber splitter) fused taper technology for transmission and distribution signal is to bundle two or more optical fibers together, then melt and stretch them on the taper puller, and monitor the change of light splitting ratio in real time. After the light splitting ratio meets the requirements, the molten stretching is ended, and one optical fiber (the rest is cut off) is reserved at one end as the input end, The other end is used as multi-channel output. Mature taper drawing process can only pull 1 at a time × Less than 4. one × 4 or more devices, multiple 1 × 2 connected together. Then it is packaged in the splitter box as a whole.