The invention discloses a Chinese medicine preparation for treating primary dysmenorrheal, a preparation method and an application. The Chinese medicine preparation is composed of medicines of angelica, flos rosae rugosae, fennel fruits, ligusticum wallichii, red paenoy roots and the like. On the basis of traditional Chinese medicine syndrome differentiation and treatment theory, the Chinese medicine preparation for treating primary dysmenorrheal is prepared by combining years of clinical experience. The Chinese medicine preparation for treating primary dysmenorrheal is characterized in that according to characteristics of hormonal level change at each stage of a sexual cycle, medicine intervention is performed at the luteal regression stage, two hormone peaks in the whole sexual cycle process can be avoided, relative excited signal molecues at the local position of uterus tissue can be directly confronted, interference for feedback effect on thalamus-hypophysis-ovarian axis sex hormone is weakened, and thereby the effect of treating the primary dysmenorrheal can be exerted. The Chinese medicine preparation for treating the primary dysmenorrheal has special good effects on the diseases of dysmenorrheal and abnormal menstruation and the like caused by kidney energy loss, qi stagnation and blood stasis, congealing cold blood stasis, stomachache due to emotional depression and the hyperactive liver-qi attacking the stomach and damp and hot accumulation, the Chinese medicine preparation for treating the primary dysmenorrheal is widely applied to clinic and relieves pains of patients, and the effective rate can reach to 96%.