A cat’s sleep time at night is about 6 hours. This has a certain relationship with the time the cat sleeps during the day. If the cat sleeps more during the day, it will sleep less at night. If the cat plays more during the day If you eat more, you will sleep more at night. Normal cats need to sleep about 16 to 20 hours a day, of which only 4 hours are deep sleep, and the rest of the time is light sleep.