We　propose　and　demonstrate　a　method　to　enhance　the　fabrication　tolerance　of　ultrasensitive　microfiber　sensors　operating　around　dispersion　turning　point,　in　which　two　stressing　parts　are　introducing　into　the　fiber　cladding　forming　two-stressing-applying　fiber.　In　this　way,　the　strict　requirements　for　microfiber　diameters　can　be　significantly　eased,　allowing　fabrication　reproducibility　and　large-scale　preparation.