Objective To investigate the current status of social alienation in colorectal cancer survivors, and to analyze its influencing factors. Methods A total of 220 colorectal cancer survivors were selected as the research subjects. A questionnaire survey was conducted using the general information questionnaire, the social alienation scale of colorectal cancer survivors, the Type D Personality Scale⁃14 (DS14), the Family Hardiness Index (FHI), and the Family Adaption, Partnership, Growth, Affection, and Resolve Index (APGAR). The social alienation levels of colorectal cancer survivors with different characteristics were compared, and a multiple linear regression model was adopted to analyze the influencing factors for social alienation among colorectal cancer survivors. Results The total scores of social alienation scale of colorectal cancer survivors were 53.00 (41.00, 66.00), DS14 18.00 (12.00, 23.00), APGAR 6.00 (5.00, 8.00) and FHI 54.00 (49.00, 63.00). There was a statistically significant difference in the total score of social alienation scale of colorectal cancer survivors with different gender, residence, marital status, tumor location, radiotherapy and chemotherapy conditions, and enterostomy conditions (P<0.05). The results of Spearman correlation analysis revealed that the total score of social alienation scale of colorectal cancer survivors positively correlated with the total score of DS14, whereas negatively correlated with the total scores of APGAR and FHI (P<0.05). The results of multiple linear regression analysis indicated that gender, residence, marital status, tumor location, radiotherapy and chemotherapy conditions, enterostomy conditions, DS14 total score, APGAR total score, and FHI total score were the influencing factors for social alienation of colorectal cancer survivors (P<0.05). Conclusion The social alienation of colorectal cancer survivors is above the medium level. Medical and nursing personnel should focus on colorectal cancer survivors who are female, living in rural areas, living alone/divorced/widowed, with lesions in the rectum, receiving radiotherapy and chemotherapy, with enterostomy, with type D personality, poor family function and low family resilience, and formulate personalized intervention strategies to reduce their social alienation levels.