The present invention provides an ultra-flexible eight-type indoor wiring optical fiber. The fiber core is a G657PA optical fiber which bends within a small radius. The symmetrical round reinforcing rods at two ends are strong aramid fibers. The sheath of outer casing is a flexible halogen-free fire retarding PE material. The whole structure is eight-shaped. The indoor wiring optical cable has characteristics of good light conducting capability, excellent compression resistance, abrasion resistance, small-radius bending resistance and the like. The indoor wiring optical fiber is suitable to be connected on various indoor communication information terminal devices.