The invention relates to a trifocal artificial lens and a manufacturing method thereof. The front surface and/or the rear surface of an optical part of the trifocal artificial lens are/is designed through an aspheric surface, and are/is of a diffraction ladder structure, the heights of every two adjacent diffraction ladders are alternately changed, and in a standard human eye model, the longitudinal spherical aberrations of the trifocal artificial lens at the retina under the 0-6 mm clear aperture are all negative values; meanwhile, as the clear aperture is increased, the absolute values of the longitudinal spherical aberrations are increased, and the longitudinal spherical aberrations of the trifocal artificial lens at the retina under the 0-6 mm clear aperture are within minus 0.26 mm tominus 0.85 mm. By means of the trifocal artificial lens, far, middle and near full-range vision is provided, and vision loss does not exist within any distance. Compared with multifocal and trifocallenses in the prior art, the contrast sensitivity of the trifocal artificial lens in the middle-range vision is obviously improved.