The present invention belongs to the technical field of traditional Chinese medicine (TCM), and specifically disclosed are a TCM composition for treating infertility, a preparation method therefor, and an application thereof. The TCM composition is formed by the following raw materials in parts by weight: 25-30 parts of Radix Rehmanniae Praeparata, 12-15 parts of Angelica Sinensis, 25-35 parts of Rhizoma Atractylodis Macrocephlae Preparata, 15-20 parts of fried Rhizoma Dioscoreae, 10-12 parts of f Radix Paeoniae Alba, 9-12 parts of raw spina date seed, 6-10 parts of Cortex Moutan Radicis, 9-12 parts of Radix Glehniae, 8-10 parts of fried Eucommia Ulmoides, 20-25 parts of Radix Codonopsis, 6-10 parts of Radix Bupleuri, 8-12 parts of fried Rhizoma Cyperi, and 6-9 parts of Caulis Periliae Argutae. The TCM composition for treating infertility provided in the present invention can increase the growth of uterine endometria thickness, enhance the tension of ovarian follicles, restore the normal development of the ovarian follicles, and finally effectively help pregnancy.