The invention discloses a novel sweat absorbing moisture wicking elastic waist interlining, comprising a composite base cloth layer and coatings. The upper surface and the lower surface of the composite base cloth layer are coated with the coatings. The composite base cloth layer is provided with an elastic waist interlining buffer area. The composite base cloth layer comprises a magnet therapy base cloth layer and a sweat absorbing base cloth layer. Through arranging the rhombus hole elastic waist interlining buffer area on the composite base cloth layer, constraint feeling caused by the elastic waist interlining is reduced while gas permeability of the elastic waist interlining is changed, so that tightening marks on a human waist are prevented in a use process of the elastic waist interlining. Through using magnetic fibers to make the elastic waist interlining, an effect of massaging a lumbar vertebra is added for an existing elastic waist interlining. Through using bamboo fibers to make the elastic waist interlining, sweat absorbing moisture wicking effects of an existing elastic waist interlining are greatly improved.