The total sleep duration of a 2-year-old baby should be 11-14 hours a day, but there are some individual differences among different babies. Babies of different ages have different sleep hour needs, and in addition there are some individual differences. According to the recommendation of the American Sleep Foundation, 2-year-old babies should have 11-14 hours of sleep, 10-11 hours at night, and 1-3 hours of nap during the day. In addition, parents can combine the growth and development of babies with their mental conditions to assess whether they are getting enough sleep. Regular and sufficient sleep is conducive to the physical and cognitive development of babies, so it is recommended that parents increase the baby’s exercise during the day to burn off energy, reasonably arrange the nap time and duration, and go to bed on time and wake up early at night.