An atrial appendage occluder capable of entering a half-released state by means of pushing a head-end optical fiber comprises: an occluder body (1) a head-end control optical fiber (2) and a tail-end control optical fiber (3). A head end of the occluder body (1) is connected to one end of the head-end control optical fiber (2) by means of a head-end threaded bushing (4). A tail end of the occluder body (1) is connected to one end of the tail-end control optical fiber (3) by means of a tail-end threaded bushing (5). The tail-end control optical fiber (3) is in the form of a hollow column. The other end of the head-end control optical fiber (2) sequentially passes through the tail-end threaded bushing (5) and the tail-end control optical fiber (3). The occluder body (1) is a woven-net support structure, and has a shape preconfigured to match the structure of an atrial appendage after the occluder body (1) has been fully released. The occluder body (1) is in the form of a strip and disposed in an outer sheath (6) before being released. The occluder body (1) is in a half-release state after being pushed out of the outer sheath (6). The diameter of the occluder body (1) is changed by pushing or pulling the head-end control optical fiber (2, 3). The atrial appendage occluder can adjust its location in an atrial appendage, such that the occluder can be released precisely in a preset location.Ce dispositif docclusion auriculaire à semi-libération assurée par un câble optique destiné à pousser une extrémité de tête comprend un corps (1) de dispositif docclusion auriculaire, un câble optique de commande (2) de lextrémité de tête et un câble optique de commande (3) de lextrémité de queue, lextrémité de tête du corps (1) de dispositif docclusion auriculaire étant connectée à une extrémité du câble optique de commande (2) de lextrémité de tête au moyen dun manchon de raccord (4) pour tige filetée dextrémité de tête, alors que lextrémité de queue du corps (1) de dispositif docclu
