A denim fabric includes blue yarns, wool white yarns and spandex. A minimum weave circulation includes 6 loop rows and 3 loop wales; the blue yarns and the spandex form a whole looping weave structure, and the wool white yarns form an inter-phase structure of tuck stitch and float stitch. The advantages of the denim fabric are that: the denim fabric is rough in texture, has excellent elasticity better than that of a common woven denim fabric, adopts all cotton as a raw material, and has a moisture absorption effect, a sweat removing effect, an anti-bacterial effect, a deodorization effect, an anti-ultraviolet light effect, and a warming effect; the denim fabric is soft in hand feeling, is light in texture, can achieve color fading and color change through washing to achieve a desired style of a garment, and shows the style of the denim fabric and an elegant feature of knit; and the denim fabric is excellent in elasticity recovery, is good in wear-resistance, is comfortable and beautiful in wearing, and meets contemporary fashion and a market popular trend.