Objective To explore the effect of bellybutton exposure on premature navel nursing effect.Method Three hundred and ninety-three premature infants were randomly divided into experiment group(n=195)and control group(198). Bellybutton fasciation and bellybutton exposure were used in the control group and the experiment group respectively. The two groups were compared in terms of umbilical shedding,time of umbilical healing,umbilical swelling,bleeding and breathing.Result The umbilical healing time in the experiment group was significantly shorter than that of the control group(P<0.05). The incidences of omphalitis,umbilical swelling and bleeding, changed breathing in the experiment group were significantly lower than those of the control group(all P<0.05).Conclusion The bellybutton exposure is effective in promoting the umbilical shedding in premature infants and reducing the incidence rate of premature navel infection.