Abstract: A waterproof LED lamp includes a lamp body. The lamp body includes a heat dissipation housing having an opening slot, and a transparent outer cover enclosing a first sealed cavity with the heat dissipation housing. At least one set of LED modules are disposed in the first sealed cavity. Each LED module includes a cavity and a transparent inner cover enclosing a second sealed cavity with the cavity. Each transparent inner cover faces the transparent outer cover. The second sealed cavity is provided with a plurality of LED light sources and a PCB board having a control circuit. Each ED light source faces the transparent inner cover. Also provided is an LED lamp set including a plurality of waterproof LED lamps. Each LED light source of the waterproof LED lamp is disposed in the second sealed cavity, and the second sealed cavity is located in the first sealed cavity.