The baby sleeps poorly according to different reasons to take different intervention methods, the following common cases: 1, vitamin D deficiency rickets, there will be poor sleep, easily startled, easy to wake up, occipital baldness, square cranium and other symptoms, usually pay attention to more lines of outdoor activities, sunshine, add supplemental food on time, more calcium-rich supplemental food, if necessary to give supplemental vitamin D and calcium supplements will gradually improve. 2, sleep disorders, most The parents should use the gradual withdrawal method to quit the above habits. 3, difficult temperament, difficult temperament baby crying more at night, easy to bring parents greater difficulties, need to go to the child health department for temperament assessment, if the difficult temperament need Early professional rehabilitation intervention.