An isolation perfusion member, an ablation electrode tip and a tumor radiofrequency ablation treatment device, the isolation perfusion member comprises an arc baffle, an extrusion airbag, a flexible substrate and a plurality of perfusion puncture heads, and the radiofrequency ablation electrode tip comprises an electrode needle, an outer sleeve and an isolation perfusion assembly or (the isolation perfusion assembly and a puncture perfusion member); the tumor radiofrequency ablation treatment device comprises a host, an image system, an auxiliary electrode, a radiofrequency ablation electrode tip, a normal saline pumping system and an air supply system. According to the radiofrequency ablation electrode tip, normal saline can be evenly poured into tumor tissue in the treatment process, on one hand, the ion content of the tumor tissue can be increased, then ablation energy is improved, the size of an ablation focus is increased, and the treatment effect is improved, on the other hand, the form of a solidification area of the tumor tissue is more regular and controllable, therefore, tumor residues and thermal damage to important anatomical structures adjacent to the target site are avoided.