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. <EOS>