One year after ablation of liver tumor, there is no change in the volume of the lesion but there is activity indicating the existence of tumor cells, which may be that the tumor cells have not been killed completely. Radiofrequency ablation of liver cancer is a treatment method in which the electrode needle is directly inserted into the tumor and the extracorporeal heating device makes the electrode needle heat up to 100-120℃, resulting in the inactivation of the tumor. Hepatic ablation has the advantages of small trauma, easy operation, few complications and repeatability. However, there is a certain recurrence rate of local ablation therapy, which may be the local residual tumor at the edge of the ablation lesion, due to the temperature can not reach the level of destroying the tumor, resulting in residual tumors or tumors are not completely ablated, at this time, the patient review will find that there is no change in the volume of the lesion, but there is activity. It is recommended that a specialist should be consulted and further treatment should be carried out under the guidance of the doctor.