Objective To explore the effects of health education using new media in nursing outside the hospital among colon cancer patients. Methods From January 2016 to December 2018, this study selected 86 colon cancer patients at Nanyang Central Hospital as subjects by convenience sampling. A total of 43 patients between January 2016 to June 2017 were in control group, and 43 patients from July 2017 to December 2018 were in observation group. Control group carried out health education outside the hospital, while observation group implemented health education using new media outside the hospital for six months. The effects were compared with the knowledge need questionnaire for cancer patients, Champion Health Belief Model Scale (CHBMS) and the Strategies Used by People to Promote Health (SUPPH) . Results Six months after discharge, the scores of knowledge need questionnaire of patients in observation group and control group were (41.24±7.64) and (51.94±9.62) respectively (t=5.712, P<0.01) ; the score of CHBMS of patients in observation group and control group were (118.10±31.53) and (92.20±28.23) respectively (t=4.013, P<0.01) ; and the score of SUPPH of patients in observation group and control group were (98.37±17.17) and (80.45±17.45) respectively (t=4.800, P<0.01) ; the differences were all statistical. Conclusions The application of health education using new media in nursing outside the hospital among colon cancer patients can improve patients' health knowledge need, rebuild the health belief and increase self-management efficacy. Key words: Colonic neoplasms; New media; Health education; Nursing outside the hospital