Objective To explore the implementation effect of an online postpartum rehabilitation promotion programme on breastfeeding and physical recovery of postpartum women. Methods A total of 70 postpartum women met the inclusion and exclusion criteria were conveniently selected and randomized into a control group and a postpartum rehabilitation group, with 35 cases in each group. The control group received routine puerperium care and follow-up, while the postpartum rehabilitation group received nursing intervention according to the online postpartum rehabilitation promotion programme. The exclusive breastfeeding rate, physical development of the infants, pelvic floor muscle strength and body recovery of the postpartum women were compared between the two groups at six months postpartum. Results After 6 months postpartum, the exclusive breastfeeding rate of the control group was 42.86%, while it was 88.57% in the postpartum rehabilitation group, and the difference between the two groups was statistically significant (P<0.05). The hip and waist circumference of the postpartum women in the postpartum rehabilitation group were significantly smaller than those in the control group, while the pelvic floor muscle strength was significantly higher than that in the control group (all P<0.05). There weren′t statistically significant differences in infants′ length and weight between the two groups (both P>0.05). Conclusion Implementing the online postpartum rehabilitation promotion programme for postpartum women can effectively increase the exclusive breastfeeding rate, promote postpartum physical recovery, and improve pelvic floor muscle strength.