The invention provides a flexible circuit board, which comprises a body and a reflector arranged on the body, and is characterized in that one end of the body is a coil assembly, the reflector is positioned on one side surface of the coil assembly, and the other end of the body is a plug-in head; the body is divided into a first part and a second part through a fixing support; the coil assembly islocated at the end, away from the fixing support, of the first part; the first part can drive the reflector to swing under the action of the coil assembly; the plug-in head is located at the end, away from the fixing support, of the second part, and the second part can drive the plug-in head to be bent. Compared with the prior art, the body is divided into the first part and the second part through the fixing support, the first part can drive the reflector to swing under the action of the coil assembly, the second part can drive the plug-in head to be bent, and therefore the coil assembly, the reflector, the plug-in head and the flexible circuit board are integrally designed, the weight is low, and the size is small.