Biological clock, also known as the physiological clock, is the internal rhythm of the life activities of living organisms. Seasonal temperature changes or staying up late can lead to biological clock disorders, which can be adjusted by improving diet, regular rest, moderate exercise, creating an environment and medication, etc.: 1, improve diet: diet needs to be nutritionally balanced, mainly light and easy to digest, eat more vitamin-rich fresh fruits, vegetables and protein-rich lean meat, milk, etc.. Avoid spicy, stimulating and excitatory food, such as alcohol, carbonated drinks, coffee, strong tea, etc.. Before going to bed, you can drink a glass of hot milk to help you sleep, it is not recommended to consume too much food, so as not to cause indigestion; 2, regular rest: you can force yourself to develop the habit of not staying up late to regularize your rest time. In the daytime, do not nap too long, it is recommended in about half an hour; 3, moderate exercise: appropriate physical exercise, aerobic exercise, such as jogging, square dancing, etc., can increase body metabolism. The body is in a tired state easier to sleep, but need to pay attention to avoid excessive exercise; 4, create the environment: create a suitable environment for rest before going to bed, the dark environment is more conducive to sleep, you can use blackout curtains. Ensure that the room is quiet, to create a sleep atmosphere; 5, medication: If you can not adjust the biological clock through the above ways, you can use appropriate sleep-aiding drugs under the guidance of a doctor, such as eszopiclone, diazepam, etc., which can shorten the waking time before bed and sleep time, improve the quality of sleep and help adjust the biological clock. In addition, quit smoking, drinking alcohol and other bad habits, reduce the use of electronic products in daily life also has a positive effect on the adjustment of biological clock to sleep early.