Can’t sleep fast heartbeat is mainly related to the following reasons: 1, the heart, the most common is heart failure, patients due to the decline in the heart’s ejection capacity, the blood supply of various organs and oxygen supply is insufficient, reflexively caused by the fast heartbeat. 2, the blood system diseases, the most common is anaemia, due to the decrease in the content of haemoglobin the body’s ability to transport oxygen decreases, leading to the various tissues and organs of the lack of oxygen, which will cause a fast heartbeat. 3, endocrine system diseases, the most common is hyperthyroidism, this case the body secretes too much thyroid hormone, will cause sympathetic excitation lead to rapid heartbeat. 4, nervous, anxious patients, this patient is often stressful, long-term sleep deprivation is also prone to cause rapid heartbeat, pay attention to improve sleep, more physical exercise can help alleviate such symptoms.