The invention discloses a traditional Chinese medicine composition for treating the vision disease and a preparation method of the composition. The composition is prepared from, by weight, 25-35% of ginseng, 20-30% of radix angelicae sinensis, 12-17% of fructus lycii, 12-17% of semen cassiae, 5-15% of mulberries and 3-8% of pepper leaves. The method comprises the steps of material preparation, wherein the ginseng radix, angelicae sinensis, fructus lycii, semen cassiae, mulberries and pepper leaves are weighed according to the proportion; mixing, wherein the raw materials are ground into dregsthrough a tool separately, and then mixing is conducted; decoction, wherein water is added to the mixed raw materials for decoction, and a decoction solution is separated from the dregs through a filtering device; oral taking of the decoction solution, wherein water is added to the dregs for decoction again, and the step is repeated 2-3 times. The semen cassiae included in raw materials of the composition can clear liver, improve the vision and prevent blurred vision, the mulberries have the function of relieving the symptom of the fatigued and dry eyes, the pepper leaves contain a large number of calcium elements and vitamins, the vision disease can be effectively prevented and treated, during preparation for use, the raw materials are decocted with water, the residual materials are usedfor external application, and the vision disease is effectively treated.