Objective To explore the effect of Internet plus hospital-community-family collaborative and continuous management model applied in transitional period for primiparas who had a preterm birth. Methods One hundred primiparas who had a preterm birth were randomized into two groups, with 50 in each group. The control group received routine education on maternal health after discharge and outpatient follow-ups, while the intervention group were given Internet plus hospital-community-family collaborative and continuous care. Results A total of 45 patients in the control group and 47 in the intervention group completed the study.The incidence of cracked or ruptured nipples, and postpartum constipation were significantly lower, whereas the rates of breastfeeding and sufficient breast milk were significantly higher in the intervention group compared with the control group (P<0.05, P<0.01). The intervention group had higher parenting competence and milder depression compared with the control group (P<0.01 for both). Conclusion Internet plus hospital-community-family collaborative and continuous management can effectively improve primiparas′ mental health, parenting competence and breastfeeding rate,however, the effect on growth and development of preterm infants is not apparent.