Inclusion Criteria:  18-70 years old patients with liver tumors, not limited to primary liver cancer or secondary liver metastases; The number of tumors is less than 5; The diameter of the tumor is less than 3 cm; No local treatment of intrahepatic tumors has been done in the past.  Exclusion Criteria:  Diffuse liver tumor; Multiple lesions in the liver> 3cm, which cannot be completely ablated; Patients with lymph node metastasis and distant metastasis outside the liver; Other situations where the researcher believes that it is necessary to withdraw from the study