Recurrence of liver cancer after ablation is usually amenable to reablation treatment, but it needs to be judged based on the recurrence of the tumor. Radiofrequency ablation for liver cancer is a thermophysical ablation procedure. After the radiofrequency needle accurately penetrates into the tumor body, the radiofrequency needle connected with the generator can emit high-frequency frequency wave, which can stimulate the ionic oscillation in the tissue cells and generate heat, and the local temperature can reach 80 to 100℃, which can quickly and effectively make the local tissues dehydrated, coagulate and dehydrate and cut off the blood supply around the tumor. Radiofrequency ablation is suitable for liver cancer that is not suitable for surgical resection, the number of lesions is less than 3, the maximum diameter of tumor is less than 5cm, and the effect is best within 3cm; although larger lesions can also be treated by multi-needle puncture, the effect is poor. Contraindications: severe hepatic and renal failure (Child-Pugh grade C), coagulation disorders or long-term use of aspirin/warfarin, etc., severe hepatic encephalopathy, a large amount of refractory ascites, acute or active infections, tumors that are too close to the porta hepatis/choledochal ducts/right and left hepatic ducts/gallbladder (<0.5cm), etc. Whether patients with recurrence after ablation can receive ablation treatment again needs to be judged according to the specific condition. It is recommended to go to a regular hospital to evaluate the condition, follow the doctor’s instructions to cooperate with the treatment, and choose the appropriate program to avoid delaying the condition.