The invention relates to a medical composition used for preventing birth defects and improving memories, which comprises atractylis ovata, ophiopogon root, vitamin A, beta-carotene, vitamin B complex, vitamin C, vitamin D, vitamin E, major elements such as calcium, potassium and magnesium, and minor elements such as zinc, selenium, ferrum, chromium, copper, molybdenum, iodine and manganese. The medical composition is mainly suitable for pregestational women, pregnant women and wet nurses, and has obvious effects on preventing birth defects and improving memories. In addition, the medical composition has the efficacy of health care and invigoration and can not cause any side effect even after long-term administration.