A waterproof, moisture-proof and dustproof LED lamp comprising a lamp body formed of a lamp base (1; 1') and a lampshade (2; 2') connected with each other, and an illuminant being disposed within the lamp body, in which: the illuminant is an LED module (3; 8') with LEDs (31; 81') provided thereon; the lamp base is of an integrated aluminum profile structure having two side walls (11, 12; 11', 12') vertically disposed along the lengthwise direction and an intermediate connecting piece (13; 13') connected between the two side walls, the top surface of the intermediate connecting piece is planar, while the bottom face thereof is provided with a plurality of radiating strips (14; 14'); and two grooves (15; 15') for receiving two side edges of the lampshade are respectively provided at the junction of the top surface of the intermediate connecting piece with each side wall; a sealing strip (4; 4') is provided between each side edge of the lampshade and each groove of the intermediate connecting piece; characterized in that the lampshade and the lamp base are connected through hasps (5; 5') disposed at each side wall of the lamp base; and two independent covers (6, 7) are provided, one at each end of the lamp base; at least two of the radiating strips (14-1; 14-2) on the bottom surface of the intermediate connecting piece are respectively L-shaped and inverted L-shaped, to form a sliding passage between these two radiating strips and the bottom surface of the intermediate connecting piece; two waterproof joints are provided, one for each cover, the joints being mounted in a sealed manner on the covers, each waterproof joint having a through hole for wires to pass through, and the covers each having a hole for wires to pass through; and a power supply drive module (9; 9') for driving the LED module is provided, sealed in a drive housing which is located outside the lamp body and connected to the bottom surface of the intermediate connecting piece of the lamp base, in which L-shaped mounting bars (101, 102) are formed outside the drive housing and slidingly disposed within a slide passage. the illuminant is an LED module (3; 8') with LEDs (31; 81') provided thereon; the lamp base is of an integrated aluminum profile structure having two side walls (11, 12; 11', 12') vertically disposed along the lengthwise direction and an intermediate connecting piece (13; 13') connected between the two side walls, the top surface of the intermediate connecting piece is planar, while the bottom face thereof is provided with a plurality of radiating strips (14; 14'); and two grooves (15; 15') for receiving two side edges of the lampshade are respectively provided at the junction of the top surface of the intermediate connecting piece with each side wall; a sealing strip (4; 4') is provided between each side edge of the lampshade and each groove of the intermediate connecting piece; characterized in that the lampshade and the lamp base are connected through hasps (5; 5') disposed at each side wall of the lamp base; and two independent covers (6, 7) are provided, one at each end of the lamp base; at least two of the radiating strips (14-1; 14-2) on the bottom surface of the intermediate connecting piece are respectively L-shaped and inverted L-shaped, to form a sliding passage between these two radiating strips and the bottom surface of the intermediate connecting piece; two waterproof joints are provided, one for each cover, the joints being mounted in a sealed manner on the covers, each waterproof joint having a through hole for wires to pass through, and the covers each having a hole for wires to pass through; and a power supply drive module (9; 9') for driving the LED module is provided, sealed in a drive housing which is located outside the lamp body and connected to the bottom surface of the intermediate connecting piece of the lamp base, in which L-shaped mounting bars (101, 102) are formed outside the drive housing and slidingly disposed within a slide passage.