The utility model discloses a LED underground lamp, including casing means and heat abstractor, transparent glass cover sets up on the lamp body, and transparent glass cover's both sides are provided with the double -screw bolt of screwing, radiating fin's the fixed inner chamber bottom that sets up at the lamp body of lower extreme, heat conduction aluminum plate sets up on radiating fin, the higher authority of mounting panel is provided with the circuit board, and the higher authority of circuit board is provided with the LED lamp, and the LED lamp is provided with four groups altogether, is provided with the spill snoot around the LED lamp, the heat dissipation layer sets up the inboard at the spill snoot, the radiator sets up the inner chamber left and right sides top at the lamp body, the reflective glass piece sets up the top at the inner chamber of lamp body, the utility model discloses the device has the irradiant function of spotlight reinforcing through be provided with the spill snoot around the LED lamp, be provided with the heat dissipation layer at the spill snoot, have the radiating function of further reinforcing, this device has preparation simple process, the practicality is strong and the radiating effect is good characteristics.