The invention relates to application of chickpea sprout extracts in medicines for preventing deficiency of estrogen. The chickpea sprout extracts are chickpea sprout isoflavone extracts, are used as estrogen receptor regulator, and are used for preparing medicines and health care products which are used for preventing or treating climacteric syndrome and osteoporosis. Tests show that the chickpea sprout isoflavone extracts can directly act onto the uterus of a patient, can remarkably increase estradiol level in blood serum, have regulating and controlling effects to a hypothalamus-hypophysis- neuroendocrine system, remarkably increase thighbone density and relative bone volume of an SD (Sprague Dawley) rat without the ovary, increase the thickness of bone trabecula, reduce separating degree of the bone trabecula, decrease the quantity of osteoclast, can alleviate bone loss of the thighbone of the rat due to the fact that the ovary of the rat is removed, increase bearing capacity of the thighbone, play an important role in regulating internal secretion conditions of middle-aged and elderly women after menopause, improving menopause symptoms such as hot flash, palpitate, skin dryness and the like and reducing possibility of osteoporosis, and lay a foundation in industrial development of functional factors of chickpeas.