A microwave ablation needle head , comprising: an outer tube , wherein the outer tube comprises a first branch tube and a second branch tube provided sequentially in a direction from a distal end to a proximal end of the outer tube , and an end of the first branch tube away from the second branch tube forms a distal end of the outer tube , wherein a material of the first branch tube is a ceramic material or polymer material; a cooling tube , wherein the cooling tube is arranged in the outer tube , the cooling tube and the outer tube are spaced apart from each other, and a first cooling flow channel is formed between the cooling tube and the outer tube , wherein a material of the cooling tube is a polymer material; and a distal end of the cooling tube is located inside a distal end of the first branch tube to form a mounting space in a distal region of the cooling tube ; a coaxial cable , wherein the coaxial cable is arranged in the cooling tube , the coaxial cable is spaced apart from the cooling tube , and a second cooling flow channel is formed between the cooling tube and the coaxial cable ; and a distal end of the coaxial cable is located in the distal end of the cooling tube ; and an electrode , wherein at least part of the electrode is located in the mounting space , and is electrically connected to the distal end of the coaxial cable ; characterized in that the microwave ablation needle head further comprises a sensing element , which is arranged on an outer peripheral wall of the first branch tube and configured to sense a part of radiation current of the coaxial cable to enhance a radiation capability. an outer tube , wherein the outer tube comprises a first branch tube and a second branch tube provided sequentially in a direction from a distal end to a proximal end of the outer tube , and an end of the first branch tube away from the second branch tube forms a distal end of the outer tube , wherein a material of the first branch tube is a ceramic material or polymer material; a cooling tube , wherein the cooling tube is arranged in the outer tube , the cooling tube and the outer tube are spaced apart from each other, and a first cooling flow channel is formed between the cooling tube and the outer tube , wherein a material of the cooling tube is a polymer material; and a distal end of the cooling tube is located inside a distal end of the first branch tube to form a mounting space in a distal region of the cooling tube ; a coaxial cable , wherein the coaxial cable is arranged in the cooling tube , the coaxial cable is spaced apart from the cooling tube , and a second cooling flow channel is formed between the cooling tube and the coaxial cable ; and a distal end of the coaxial cable is located in the distal end of the cooling tube ; and an electrode , wherein at least part of the electrode is located in the mounting space , and is electrically connected to the distal end of the coaxial cable ; characterized in that the microwave ablation needle head further comprises a sensing element , which is arranged on an outer peripheral wall of the first branch tube and configured to sense a part of radiation current of the coaxial cable to enhance a radiation capability. <EOS>