This study explores the perspectives and challenges faced by family members providing mental support to cancer patients in Beijing, China. The primary objective is to understand the emotional and practical roles family members undertake and the difficulties they encounter. Utilizing a qualitative research design, data were collected through semi-structured interviews with family caregivers of cancer patients. Thematic analysis revealed several key themes: the dual burden of emotional support and caregiving responsibilities, the impact on daily life and personal well-being, the role and effectiveness of external support systems, perceptions of medical staff support, and the common challenges and conflicts faced in caregiving. The findings highlight the critical need for comprehensive support systems that address both the emotional and practical needs of family caregivers. Recommendations for enhancing family-centered support programs in oncology settings are discussed.