Aim:A randomised controlled trial (RCT) was implemented to verify the feasibility and acceptability of cognitive education in the format of mind maps for increasing perceived control and decreasing the symptom distress of lung cancer patients who were receiving chemotherapy.Methods: A total of 136 lung cancer patients who were receiving chemotherapy were randomised using stratified blocks (1:1 ratio,The intervention group was given cognitive education in the format of mind maps.The control group was provided conventional education. The primary outcomes were perceived control, including cancer experience and cancer efficacy; the secondary outcomes included symptom distress (arising from fatigue, distress, sleep disturbance, poor appetite, drowsiness, shortness of breath, etc.). The Mann-Whitney U test, chi-squared test, two-sample t test and repeated measurement analysis of variance were used.Results: Ninety-four patients completed the final study. The results of the repeated measurement analysis of variance indicated that at the 8th or 12th week following cognitive education intervention in the format of mind maps, the cancer experience, cancer efficacy (except personal efficacy) and symptom distress (arising from fatigue, distress, sleep disturbance, and sadness and its total scores) of the patients in the intervention group were considerably improved compared with those of the control group (p < 0.05). The longer the intervention was, the higher the level of the patients' perceived control was and the lower the degree of patient symptom distress was (p < 0.05). Conclusions:Our findings suggest that cognitive education in the format of mind maps could improve perceived control and decrease the symptom distress of lung cancer patients who were receiving chemotherapy and that it was feasible and acceptable. Cognitive education in the format of mind maps was found to be an effective teaching tool for lung cancer patients who were receiving chemotherapy. K E Y W O R D Schemotherapy, cognitive education, lung cancer, perceived control, symptom distress