The invention discloses a preparation device and a preparation method of a cellulose fiber yarn bundle and the fiber yarn bundle, and belongs to the technical field of cellulose. The preparation device comprises spinning packs, air gap cooling mechanisms, coiling devices, condensation systems and traction devices, wherein the spinning packs correspond to the winding devices one to one; the winding devices are the exerting points of fiber formation tension force and comprise fixing plates, driving rollers and separator rolls. Fiber spinning stoste extruded from the spinning packs passes through the air gap cooling mechanism and is subjected to traction tension force from the winding device, then the formed yarn bundle is firstly wound to the driving rollers, passes through the separator rolls and is further wound to the driving rollers, after being wound for multiple circles, the yarn bundle is gathered into a total yarn bundle, and the total yarn bundle is conveyed to later procedures through the traction devices; the winding devices are arranged on one same horizontal line; the driving rollers have same winding speeds. The preparation method is implemented on the basis of the preparation device, and the fiber yarn bundle is prepared by using the preparation device and the preparation method. The uniformity of the fiber yarn bundle prepared by using the preparation device and the preparation method is improved.