The invention discloses an LED wall washing lamp which comprises a lamp body. The lamp body is provided with a first containing cavity, a second inner wall of the first containing cavity extends to form a first baffle and a second baffle, a first drainage channel is formed between the first baffle and a first inner wall, the first inner wall is provided with a first flow guide slope, the first flow guide slope is provided with a first injection opening, and the first injection opening is communicated with the first drainage channel; a second drainage channel is formed between the second baffle and a third inner wall, a second flow guide slope is arranged on the third inner wall and is provided with a second injection opening, and the second injection opening is communicated with the second drainage channel; and a containing groove is formed between the first baffle and the second baffle and is provided with an LED light source assembly and a sealing glue layer, a light outlet is formed between the first inner wall and the third inner wall, and a light transmitting plate is arranged at the position of the light outlet. By means of the above structural arrangement, the using effect of the product is effectively promoted.