A multi-angle light source device comprising: a holder; a housing, wherein the holder is movably connectable with the housing to rotate relative to the housing, a power supply received in the housing and electrically connected to the holder; and a body fixedly connected to the housing, the body comprising a fixing portion connected to a proximal portion of a connecting portion, wherein the connecting portion and at least one illuminant connected to a distal portion of the connecting portion are configured to rotate relative to the fixing portion, and wherein the illuminant is configured to rotate relative to the connecting portion; wherein the connecting portion comprises a sleeve and an internal, hollow sleeve axis sleeved by the sleeve and the sleeve is configured to rotate about the sleeve axis; wherein the connecting portion further comprises an installing portion provided with a rotating member configured to rotate around the installing portion and fixedly connected to the illuminant, wherein the sleeve axis includes an elastic element, and a blocking portion connected to the elastic element and in contact with the rotating member; the rotating member is configured to rotate in the installing portion, and the elastic element is compressed so that the rotating member, the sleeve and the sleeve axis are all damped during their rotations without needing for external adjustment. a holder; a housing, wherein the holder is movably connectable with the housing to rotate relative to the housing, a power supply received in the housing and electrically connected to the holder; and a body fixedly connected to the housing, the body comprising a fixing portion connected to a proximal portion of a connecting portion, wherein the connecting portion and at least one illuminant connected to a distal portion of the connecting portion are configured to rotate relative to the fixing portion, and wherein the illuminant is configured to rotate relative to the connecting portion; wherein the connecting portion comprises a sleeve and an internal, hollow sleeve axis sleeved by the sleeve and the sleeve is configured to rotate about the sleeve axis; wherein the connecting portion further comprises an installing portion provided with a rotating member configured to rotate around the installing portion and fixedly connected to the illuminant, wherein the sleeve axis includes an elastic element, and a blocking portion connected to the elastic element and in contact with the rotating member; the rotating member is configured to rotate in the installing portion, and the elastic element is compressed so that the rotating member, the sleeve and the sleeve axis are all damped during their rotations without needing for external adjustment. wherein the connecting portion comprises a sleeve and an internal, hollow sleeve axis sleeved by the sleeve and the sleeve is configured to rotate about the sleeve axis; wherein the connecting portion further comprises an installing portion provided with a rotating member configured to rotate around the installing portion and fixedly connected to the illuminant, wherein the sleeve axis includes an elastic element, and a blocking portion connected to the elastic element and in contact with the rotating member; the rotating member is configured to rotate in the installing portion, and the elastic element is compressed so that the rotating member, the sleeve and the sleeve axis are all damped during their rotations without needing for external adjustment.