The invention discloses a full-
fiber base flexible sensor and a preparation method and application thereof. The full-
fiber base flexible sensor comprises an elastic electric conduction
rope core and asensing layer which is knitted by electric conduction yarns and is packed on the periphery of the elastic electric conduction
rope core, wherein the resistance of the
rope core is lower than that ofthe sensing layer. The full-
fiber base flexible sensor disclosed by the invention adopts an elastic electric conduction
yarn; by a rope knitting method, an
electrode layer of a
stress sensor is packedin the sensing layer, and a wire-shaped sensing material adopting a wrapper and core structure which compositely integrates the sensor with the
electrode, and the wire-shaped sensing material can befurther directly mixed and knitted with ordinary yarns or wire-shaped elastic bodies to obtain pieces to be used as the flexible
pressure sensing electronic device; the wire-shaped sensing material isapplied to the fields of detection of
human body physical health (pulse ) and total range movement (
facial expression, sound producing, and joint movement ) and the like; and the wire-shaped sensingmaterial has the characteristics of being simple in structure, high in stability, simple and convenient in preparation technology, good in reproducibility, high in detection sensitivity and the like.