The present invention discloses a high contrast water-proof LED lamp, including: a casing provided with a reflective cup (10), a PCB (12) disposed on the bottom surface of the casing, an LED chip (1) disposed inside the reflective cup (10), and a light-guiding packaging adhesive (4). The casing is composed of a light color layer (8) in the lower part and a dark color layer (9) in the upper part, and a top surface of the PCB (12) and an outer surface of the light color layer (8) of the casing are provided with black water-proof adhesive sealant (11). The lower part of the inner surface of the reflective cup is a light color layer and the upper part is a dark color layer.