Purpose: To study the impact of the combination of capecitabine and irinotecan on the safety of colon cancer treatment, adverse reactions and wellbeing of patients.Methods: Colon cancer subjects (n =120) admitted to Guangzhou First People’s Hospital, Guangzhou, China were assigned equally to two groups (A and B) according to their order of admission, and they received intravenous infusion of irinotecan. In addition, group A patients were administered capecitabine, but those in B group were given tegafur, gimeracil and oteracil porassium. The patients in groups A and B were compared with respect to the incidence of unwanted effects, quality of life (QoL), and overall clinical efficacy of the treatments.Results: Cases of nausea and vomiting, delayed diarrhea and sensory neuropathy of the patients were significantly reduced in group A, relative to group B. Moreover, QoL score after treatment was markedly higher in group A than in group B, while the objective response rate (ORR) of colon cancer patients in group A was also significantly higher than that in group B (p < 0.05). However, no obvious difference in disease control rate (DCR) was observed between groups A and B (p > 0.05).Conclusion: Combined capecitabine and irinotecan therapy effectively improves clinical prognosis, reduces the incidence of adverse reactions, and is safe in colon cancer patients. Therefore, the combined treatment may be beneficial in the management of colon cancer.