The invention provides a blue-light-removing light diffusion material, photocureable coating and LED light source. The blue-light-removing light diffusion material comprises PC, an organosilicon lightdiffusion agent, a nano rare earth oxide and an antioxidant; the blue-light-removing photocureable coating is prepared from UV-cured acrylate, nano rare earth oxide, rare earth naphthenate and elargol; the blue-light-removing LED light source comprises an LED chip, a light-emitting surface of the LED chip is covered with a blue-light-removing fluorescent coating, which comprises fluorescent powder and the blue-light-removing light diffusion material and/or blue-light-removing photocureable coating. By adding rare earth elements in a proper proportion, harmful blue light is reduced, eye pathological harm and human body rhythm harm of myopia, cataract and maculopathy caused by blue light are effectively avoided, harmless blue light is added, melatonin secretion is inhibited, the effect of refreshing people is achieved, meanwhile, spectrum distribution is uniform, uniform and soft light emitting is guaranteed, glare is avoided effectively, and the light source provided by the invention is particularly suitable for replacing a fluorescent lamp in a classroom, so that the eyesight of children is protected.