The utility model discloses a warm-keeping elastic jean fabric, which belongs to the
textile field and comprises warp yarns and weft yarns interwoven with each other, the weft yarns comprise first weft yarns and second weft yarns, the count of the first weft yarns is smaller than that of the second weft yarns, and the first weft yarns comprise first
yarn cores, cotton-wrapped yarns and
moisture-absorbing heating acrylic fibers which are wound on the surfaces of the first
yarn cores; the second
weft yarn comprises spandex serving as a second
yarn core and a covering layer covering the spandex, and the elasticity of the first yarn core is weaker than that of the spandex. The first weft yarns are thicker than the second weft yarns, and the second weft yarns are tensioned by utilizing the elasticity of the spandex, so that the second weft yarns are positioned at positions closer to the interior of the fabric and are not easily hooked by a fleece
machine, the spandex is less exposed and broken after raising, the elasticity reduction amplitude of the fabric after fleece is greatly reduced, and the second weft yarns are more easily hooked by the fleece
machine; and the hooked fibers after fleece raising mainly come from the cotton wrapped yarns on the outer surfaces of the first weft yarns, the
moisture-absorbing and heat-emitting acrylic fibers and the warp yarns, so that the fluff can absorb
moisture and emit heat, and is good in warm-keeping capability.