The invention discloses a light emitting diode module, which comprises a transparent carrier, a support and light emitting crystal grains, wherein the carrier is concavely provided with a plurality of spaced grooves which accommodate the light emitting crystal grains respectively to form a light exit region; and one side, different from the side with grooves, of the carrier is provided with a reflecting part which comprises at least one inclined plane for reflecting light transmitted outside from the side walls of the grooves to the periphery of the light exit region of the carrier to improve the uniform light projection of the carrier. And needed line sources of different sizes can be arranged by increasing the number of the grooves.