The utility model provides a waist pack which comprises a waist pack body, one or more auxiliary bags, first fasten belts, and fasten mechanisms, wherein a main bag is arranged on the waist pack body; the auxiliary bags used for accommodating water bottles are arranged on the waist pack body; the first fasten belts are arranged above the auxiliary bags and used for sleeving the water bottles; the fasten mechanisms are arranged on the outer side surfaces of the auxiliary bags; the fasten mechanisms comprise first connecting belts and second fasten belts; the second fasten belts penetrate connecting fasteners; two ends of each second fasten belt are connected onto the waist pack body; the first connecting belts can penetrate the connecting fasteners in a pulling manner. As the auxiliary bags used for accommodating the water bottles are arranged on the waist pack body, the water bottle can be vertically placed conveniently to avoid the phenomenon that water flows out as the covers of the water bottles are not well screwed.