Provided are an ablation needle assembly (100) and an ablation system. The ablation needle assembly (100) comprises a hollow outer sleeve (30) and an ablation needle (10), wherein the outer sleeve (30) is movably sheathed outside an electrode needle main body (11) of the ablation needle (10) and is detachably and rotatably connected to an ablation handle (12), such that after an ablation operation is completed, the ablation needle (10) can be detached from the outer sleeve (30), and the outer sleeve (30) still remains in a tissue to provide a channel for other operations, such as a biopsy, thereby avoiding repeated puncturing, reducing damage to the tissue and achieving a more convenient and high-efficiency biopsy operation. Furthermore, the ablation handle (12) is rotatably connected to the outer sleeve (30), such that when rotating relative to the outer sleeve (30), the ablation handle (12) can drive the electrode needle main body (11) to rotate relative to the outer sleeve (30), i.e. the outer sleeve (30) and the electrode needle main body (11) are not of an integrated structure, and when the ablation needle (10) needs to be rotated, the outer sleeve (30) can remain static, thereby reducing damage to the tissue and having a relatively small rotation resistance. Therefore, the ablation needle assembly (100) and the ablation system are particularly applicable to radiofrequency ablation treatment of hypertrophic cardiomyopathy.L'invention concerne un ensemble aiguille d'ablation (100) et un système d'ablation. L'ensemble aiguille d'ablation (100) comprend un manchon externe creux (30) et une aiguille d'ablation (10), le manchon externe (30) étant gainé de façon mobile à l'extérieur d'un corps principal d'aiguille d'électrode (11) de l'aiguille d'ablation (10) et étant relié de manière amovible et rotative à une poignée d'ablation (12), de telle sorte qu'après achèvement d'une opération d'ablation, l'aiguille d'ablation (10) peut être détachée du manchon externe (30)
