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.