Objective To investigate the family-dependence status in patients with tumor, and analyze the related factors of family dependence. Methods The self-made family-dependence scale was distributed to 432 patients with tumor to asses their family dependence status. Results The mean score of family-dependence was 40±5.8. A total of 198 cases (45.8%) were family-dependent, including 52 mild cases, 98 moderate cases, and 48 severe cases. The logistic regression analyses showed that sex (OR=3.873, P=0.022), age (OR=2.378, P=0.035), and personality type (OR=1.079, P=0.028) were the related factors of family-dependence. Conclusion More attention should be paid to patients with tumor about their family-dependence. After being instructed, the family members should use proper emotional expression method to provide family support to the patients with tumor. The female patients, older patients, and patients with dependent personality should be encouraged to improve their self-care ability to avoid family-dependence as possible as they can.