We plan to conduct a prospective, two-arm, open-label phase Ⅱ study to evaluate whether transarterial chemoembolization with FOLFOX plus/minus intravenous cetuximab/bevacizumab significantly improves the efficacy and safety compared with systemic FOLFOX therapy plus/minus cetuximab/bevacizumab in elderly patients with advanced unresectable colorectal cancer.

Inclusion Criteria:

• Age ≥ 65 years, gender not restricted Pathologically confirmed advanced colorectal cancer without the opportunity for curative surgery Karnofsky Performance Status (KPS) score ≥ 60, with an estimated survival time ≥ 3 months At least 1 measurable colorectal lesion No prior systemic chemotherapy, or a minimum interval of 6 months between the last chemotherapy and study enrollment Voluntary signing of the informed consent form

Exclusion Criteria:

• Concomitant other malignant tumors Presence of gastrointestinal perforation Severe cardiovascular and cerebrovascular diseases Patients with hypersensitivity to study drugs or psychiatric disorders