Men can take folic acid, eat food rich in high quality protein, trace elements, try to achieve balanced nutrition. Men should take extra folic acid supplements during the preparation period, which can prevent fetal neural tube deformities and facilitate the growth and development of the fetus when the woman is successfully pregnant. Men in the preparation period should supplement high-quality protein diet, such as deep-sea shrimp, oysters, soybeans, lean meat, eggs, etc., can coordinate the male endocrine function, improve the quantity and quality of sperm. Men in the preparation for pregnancy should eat food rich in trace elements, such as spinach, red dates, black dates, potatoes, amaranth, kelp, purple belt and other foods, to replenish the body’s nutrients, can regulate the body. Men’s preparation for pregnancy should pay attention to nutritional supplements, try to avoid too picky eaters.