The utility model discloses a multifunctional first aid shoulder bag, shoulder bag are the cuboid, and it includes the utricule and set up the system of bearing on the utricule that the system of bearing includes braces, waistband and back frame, the utricule includes page or leaf and middle part baffle behind utricule front sheet, the utricule, and the page or leaf is by hasp swing joint behind middle part baffle and the utricule, and the page or leaf is by water -tight zipper swing joint behind utricule front sheet and the utricule, middle part baffle front portion is provided with removable module package I and is provided with removable module package II with elastic fixation area, middle part baffle rear portion, outside sign and the horizontal area that hangs of openly being provided with of utricule front sheet, the inside removable module package III that is provided with of utricule front sheet, the outside top of page or leaf is provided with the carrying handle behind the utricule, and the outside both sides of page or leaf are provided with the side package behind the utricule, the inside removable module package IV that is provided with of page or leaf behind the utricule. This shoulder bag can portablely also can be born, and the system of bearing accords with the human engineering principle, can alleviate the tired sense when bearing, takes the convenience, can adapt to the tactics remedy for war wound needs under the various conditions.