The invention relates to purified cotton linen-like bamboo joint twill. Warps of the purified cotton linen-like bamboo joint twill are 58.3tex cotton and 72.9tex cotton/18 bamboo joint yarns, and wefts are 58.3tex cotton and 7.9tex spandex wrap yarns. The ratio of flat yarns to the bamboo joint yarns in the warps is 4:1, roughness of the bamboo joint yarns is 2, and the texture structure is fabricated by two upper needles as one lower needle and inclined rightwardly. As the ratio of the rough bamboo joint yarns to basic yarns is increased and proportion of the flat yarns and the bamboo joint yarns is increased, average bamboo joint distance and bamboo joint length of the bamboo joint yarns are matched so as to display characteristics of fullness and clearness of bamboo joints on the twill, uniformity, neatness, stiffness, smoothness and high linen-like sense of the twill. Technically, slashing adopts sectional and size separating grooves for sizing, feed, backing-off tension and wet-area tension of two sizing grooves are reasonably controlled, and uniform extension of the bamboo joint yarns and the flat yarns is uniform, and reasonable sizing formula and sizing process is selected, sizing effect is good, denting process selects high-elasticity and rough reeds, the fabricating process includes normal tension, early opening and late closing, palm frame height is reasonable adjusted, the bamboo joints are almost free of breakage, flaws on the twill surface are reduced, efficiency of a fabricating machine is improved, energy consumption is reduced, and clear grains and full texture of the twill surface are guaranteed.