The invention discloses a cool fibrous comfortable ecological knitted fabric and a knitting method thereof. The knitted fabric is formed by a plain stitch structure and a float stitch structure, wherein the plain stitch structure is formed by alternately knitting cool fiber/cotton blended yarns and spandex yarns; the float stitch structure is formed by knitting trilobal superbright polyester yarns. The cool fibrous comfortable ecological knitted fabric is rich in color, strong in three-dimensional effect of patterns, clear in texture and prominent in three-dimensional effect of surface, and has wide goose type special jacquard effect. Through the selection of raw materials as well as reasonable structure and knitting, dyeing and finishing process routes, the knitted fabric has effects of improving blood circulation, promoting metabolism, and improving cool and comfortable properties.