An endoscopic ultrasonography flexible microwave ablation needle, comprising a handle (01), a radio frequency coaxial connector (7) and a microwave radiation antenna (9), the radio frequency coaxial connector (7) being arranged on the handle (01), the radio frequency coaxial connector (7) being connected to the microwave radiation antenna (9) via a radio frequency coaxial cable (8), a capillary tube (10) and an inner tube (11) being sequentially arranged around the radio frequency coaxial cable (8), the radio frequency coaxial cable (8) being arranged within the capillary tube (10), the capillary tube (10) being arranged within the inner tube (11), the inner tube (11) comprising a first end portion (110) and a second end portion (111), the first end portion (110) extending to the microwave radiation antenna (9), the second end portion (111) being away from the microwave radiation antenna (9), the inner tube (11) gradually thinning from the second end portion (111) to the first end portion (110). The ablation needle is capable of reaching more lesions, and has strong penetrability.
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