The more wavelengths can be generated, the more retinopathy can be cured. An equipment which can generate laser in three colours, red, yellow and green is introduced. It can be appled in diverse retinopathyes. There are two all-soild-state lasers in this equipment. It can work with only one wavelength mode. It also can work with three wavelengths mode by means of fibre coupling and optical mixing. The power of the fundamental frequency light is respectively 26 W and 47 W at the wavelengths 1320 nm and 1064 nm. The power of the 660 nm and the 532 nm is respectively 1 W and 1.9 W; and the output power of the fiber is respectively 0.8 W and 1.5 W. The output power of "Y fiber" is 1.6 W after mixing. In distinct situation, this equipment can take the advantage of the red, yellow and green laser.