A lighting device, comprising: a base assembly , wherein a circuit board is provided in the base assembly ; a telescopic assembly provided with a fixed end and a free end that are arranged oppositely, wherein the fixed end is connected to the base assembly ; and a lighting assembly rotatably connected to the free end to rotate axially and radially along the free end and provided with a lighting element electrically connected to the circuit board ; wherein the base assembly comprises a base , and a main body and a guide rail element both of which are hollow-through; wherein the guide rail element has one end connected to the main body and the other end connected to the base ; an inner space of the main body is communicated with an inner space of the guide rail element ; the circuit board is provided in the main body ; and the fixed end passes through the inner space of the main body and the inner space of the guide rail element in sequence and is connected to the base ; and the lighting device further comprises: a spring wire provided with one end electrically connected to the circuit board ; and a first connector and a second connector , which are electrically connected and arranged inside the telescopic assembly at the free end , wherein the other end of the spring wire passes through a gap between the telescopic assembly and the guide rail element , then bends and extends into the telescopic assembly , and is electrically connected to the first connector ; and the second connector is electrically connected to the lighting element . a base assembly , wherein a circuit board is provided in the base assembly ; a telescopic assembly provided with a fixed end and a free end that are arranged oppositely, wherein the fixed end is connected to the base assembly ; and a lighting assembly rotatably connected to the free end to rotate axially and radially along the free end and provided with a lighting element electrically connected to the circuit board ; wherein the base assembly comprises a base , and a main body and a guide rail element both of which are hollow-through; wherein the guide rail element has one end connected to the main body and the other end connected to the base ; an inner space of the main body is communicated with an inner space of the guide rail element ; the circuit board is provided in the main body ; and the fixed end passes through the inner space of the main body and the inner space of the guide rail element in sequence and is connected to the base ; and the lighting device further comprises: a spring wire provided with one end electrically connected to the circuit board ; and a first connector and a second connector , which are electrically connected and arranged inside the telescopic assembly at the free end , wherein the other end of the spring wire passes through a gap between the telescopic assembly and the guide rail element , then bends and extends into the telescopic assembly , and is electrically connected to the first connector ; and the second connector is electrically connected to the lighting element . a spring wire provided with one end electrically connected to the circuit board ; and a first connector and a second connector , which are electrically connected and arranged inside the telescopic assembly at the free end , wherein the other end of the spring wire passes through a gap between the telescopic assembly and the guide rail element , then bends and extends into the telescopic assembly , and is electrically connected to the first connector ; and the second connector is electrically connected to the lighting element . <EOS>