Generally speaking, coffee does not kill sperm. Generally drinking coffee may lead to brain excitement and stimulate one’s sympathetic nerves, which in turn may cause insomnia. And insomnia may affect the physical quality and endocrine level in the body, which indirectly affects the sperm production. But coffee itself has no killing effect on sperm. At the same time, it is important to note that drinking large quantities of coffee for a long time will cause some stimulation of the gastric mucosa, leading to excessive secretion of gastric acid, thus causing gastric discomfort. Another point to note is that drinking coffee in moderation is not harmful to the body, if the intake of caffeine is too much it is easy to lead to tachycardia, some patients may be more sensitive because of their own, there will be arrhythmia and other problems, the symptoms are serious. If any physical discomfort occurs, it is important to seek medical examination and treatment in a timely manner so as not to delay the condition.