The invention discloses a moisture-proof LED lamp capable of being repeatedly turned on. The moisture-proof LED lamp includes a strip-shaped lower shell, a strip-shaped upper shell, an insulated circuit board, an LED light bar, quick snap joints, an auto-hinge, a sealing rubber ring, a cooling fin and a moisture-proof device. one side of the strip-shaped lower shell and the strip-shaped upper shell are connected through an auto-hinge, and remaining edges of the strip-shaped lower shell are provided with the quick snap joints, and at the same time, a corresponding snap joint position is arranged on the strip-shaped upper shell, a groove is formed at an edge of the strip-shaped lower shell, the sealing rubber ring is installed in the groove, and the cooling fin is arranged at the bottom of the strip-shaped lower shell. The moisture-proof device includes a rubber water stop tape, an optical fiber fixing clip, a clamping groove type rail and a pressure detection loop, and the rubber waterstop tape is connected with the pressure detection loop through the clamping groove type rail. The LED light can not only detect whether water is taken in, but can be easily disassembled, and can remove moisture and be replaced at any time.