There are two possibilities for the recurrence of liver cancer one month after resection: the lesion of liver cancer is larger, and the malignancy of liver cancer is high. 1. The lesion of liver cancer is larger: the staging is a bit late and the lesion is larger before the surgery is performed. Only the lesions that can be seen with naked eyes are removed during surgery, and the lesions may not be completely removed, leading to recurrence. Careful and meticulous preoperative examination must be carried out before surgery to grasp the indications for surgery. 2. High degree of malignancy of liver cancer: this kind of malignant liver cancer has a possibility of recurrence because the development speed, spread and metastasis are very fast. After recurrence, patients are recommended to undergo surgical treatment if they can be treated surgically; if surgery is not possible, microwave ablation therapy, radiofrequency ablation therapy, cryotherapy and chemotherapy can be used; under the guidance of doctors and according to the different conditions of patients.