Split-type ablation needle and cryoablation puncture system

A split-type ablation needle, connected to a cryoablation device, the cryoablation device being provided with a first-type joint, the first-type joint having a first connector and a first cavity, two first channels being provided in the first cavity, the two first channels being in communication with the interior of the cryoablation device for outputting and inputting a medium inside the cryoablation device respectively, wherein the split-type ablation needle comprises:

• a needle arranged at a distal end of the split-type ablation needle;
• a tube body connected to the needle, the interior of the tube body being provided with:
• two second channels used for delivering the medium to the needle and delivering the medium returned from the needle respectively, and
• an insulation structure circumferentially wrapping the exterior of the two second channels;
• and
• a second-type joint, comprising:
• a second connector, and
• a second cavity, wherein two third channels are provided in the second cavity, and the two third channels are in communication with the two second channels respectively;
• the second connector is matched with the first connector, and the second connector is enable to be assembled with or disassembled from the first connector;
• when the second connector is assembled with the first connector, the second-type joint and the first-type joint form a sealing structure, and the two third channels are in communication with the two first channels respectively.