This prospective, single-arm, multicenter Phase II clinical trial aims to evaluate the efficacy and safety of Benmelstobart plus anlotinib combined with SBRT in patients with oligometastatic hepatocellular carcinoma who have failed first-line targeted therapy. Key study questions include: What is the progression-free survival (PFS) for patients treated with this regimen? How do the objective response rate (ORR), disease control rate (DCR), and overall survival (OS) compare? What are the safety and tolerability profiles of the combination therapy? Eligible subjects (after signing informed consent) will receive anlotinib 10mg on days 1-14 every 3 weeks + Benmelstobart 1200mg on day 1 every 3 weeks + SBRT. Treatment cycles will be 3 weeks long, continuing until a protocol-specified treatment discontinuation event occurs. Following treatment completion, subjects will undergo post-treatment safety follow-up and survival monitoring, with tumor progression monitoring conducted post-treatment.