Objective To explore the network between childhood trauma and internet addiction among undergraduate nursing students, to identify the key nodes, and to provide reference for prevention and intervention of internet addiction. Methods A convenience sample of 1,380 undergraduate nursing students were surveyed using the Childhood Trauma Questionnaire and the revised Chinese Internet Addiction Scale.R4.4.0 was used to construct the network structure, and to identify the node centrality and robustness of the results. Results The sample scored （33.73±10.57） for childhood trauma and （39.26±11.09） for internet addiction.Network analysis revealed the strongest association between physical neglect and internet addiction tolerance （r=-0.057）, followed by physical neglect and interpersonal and health-related problems （r=0.056）.The compulsive use of the internet and withdrawal symptoms had the highest expected influence （EI=0.876）, and the interpersonal and health-related problems had the highest bridge expected influence （BEI=1.075）. Conclusion The compulsive use of the internet and withdrawal symptoms, as well as the interpersonal and health-related problems are the core and bridge nodes in this network.It is recommended that nursing educators develop personalized intervention strategies targeting these core issues to effectively reduce the risk of internet addiction among undergraduate nursing students.