Objective To explore the effect of extended nursing based on WeChat platform on patients discharged from hospital after severe hand trauma. Methods A total of Fifty patients with hand trauma treated in our hospital from June 2017 to December 2018 were selected as subjects and divided into control group (n=25) and observation group (n=25)according to random number table method. The control group was treated with routine nursing. The observation group was treated with extended nursing based on WeChat platform. The Carroll upper limb function score, hand sensory function grade, incidence of complications and exercise compliance rate were compared between the two groups after 6 months of intotal tervention. Results The Carroll upper limb function score, hand sensory function grade and exercise compliance rate in the observation group were higher than those in the control group, with statistical differences (P<0.05), and the total incidence of complications in the observation group was lower than that in the control group, with statistical difference (P<0.05). Conclusion Extended nursing based on WeChat platform promotes the recovery of hand function of patients with hand trauma, reduces the incidence of complications, improves exercise compliance, and helps patients take office as soon as possible to realize their personal value.