Lenvatinib is the standard of care for patients with advanced hepatocellular carcinoma (HCC). The aim of the single-arm, open-label, phase II clinical trial is to evaluate the efficacy and safety of lenvatinib as an adjuvant therapy for patients underwent radical resection of HCC with a high risk of tumor recurrence. Investigator hypothesize that lenvatinib may be an effective adjuvant treatment for HCC, and 12-month adjuvant treatment with lenvatinib can improve one-year recurrence-free survival rate (RFS) of HCC patients after surgical resection.