A nozzle rotating mechanism and a face steaming device, wherein the nozzle rotating mechanism comprises a nozzle and a driving mechanism (2) that causes the nozzle to rotate, the nozzle being located outside of the axial center of the axis of rotation B of the nozzle, and the axial center C of the nozzle being parallel to or forming an angle with the axis of rotation B of the nozzle; during use, the nozzle rotating mechanism is driven by the driving mechanism (2) to rotate; since the axial center C of the nozzle is parallel to or forms an angle with the axis of rotation B of the nozzle, i.e., the axial center C of the nozzle and the axis of rotation B of the nozzle are not on the same line, when the nozzle rotates by using the axis of rotation B of the nozzle, the nozzle necessarily forms a large radius of rotation relative to the axial center of the axis of rotation B of the nozzle, thus the area formed by the nozzle is large, and the area of steam injection may be increased so as to better suit different user requirements and improve user experience; at the same time, the structure is simple, compact, stable and reliable; the nozzle rotating mechanism is widely applicable in steam cleaning equipment used for face steaming instruments and the like.L'invention concerne un mécanisme de rotation de buse et un dispositif de bain vapeur facial, le mécanisme de rotation de buse comprenant une buse et un mécanisme d'entraînement (2) qui provoque une rotation de la buse, la buse étant située à l'extérieur du centre axial de l'axe de rotation B de la buse, et le centre axial C de la buse étant parallèle à l'axe de rotation B de la buse et formant un angle avec cet axe ; en cours d'utilisation, le mécanisme de rotation de buse est entraîné par le mécanisme d'entraînement (2) pour provoquer une rotation ; comme le centre axial C de la buse est parallèle à l'axe de rotation B de la buse ou forme un angle avec cet axe, c'est-à-dire que le centre axial C de la buse et l'axe de r