The invention relates to a lighting device (100) which comprises a light guide plate (1), a light recycling film (2) and at least one light source (3). The light guide plate (1) comprises a top surface (11), a bottom surface (12) and a peripheral surface (13) connected between the top surface (11) and the bottom surface (12); the light recycling film (2) is arranged on the bottom surface (12); the light sources (3) are arranged on the peripheral surface (13), a plurality of microstructures (14) are formed on the bottom surface (12), light from the light sources (3) enters the light guide plate (1) from the peripheral surface (13) and exits from the microstructures (14), and the exiting light is reflected into the light guide plate (1) by the light recycling film (2).