An atrial septostomy system (100) having an improved ablation effect, comprising an atrial septostomy device (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i), an ostomy device control mechanism (50) for controlling the atrial septostomy device (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i), and a radio frequency power source； the radio frequency power source is electrically connected to an ablation member (210, 210a, 210b, 210c, 210d, 210e, 210f) of the atrial septostomy device (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i) by means of the ostomy device control mechanism (50)； the atrial septostomy device (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i) comprises a support skeleton (21, 21a, 21b, 21c) used for opening a perforation on an atrial septum (601), the support skeleton (21, 21a, 21b, 21c) is provided thereon with at least one ablation member (210, 210a, 210b, 210c, 210d, 210e, 210f), and the ablation member (210, 210a, 210b, 210c, 210d, 210e, 210f) contacts the atrial septum (601) and is used to ablate the atrial septum (601)； besides the ablation member (210, 210a, 210b, 210c, 210d, 210e, 210f), the atrial septostomy device (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i) cannot ablate blood or tissue. An atrial septostomy device (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i) of the atrial septostomy system (100).La présente invention concerne un système de septostomie auriculaire (100) ayant un effet d'ablation amélioré, comprenant un dispositif de septostomie auriculaire (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i), un mécanisme de commande de dispositif de stomie (50) pour commander le dispositif de septostomie auriculaire (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i), et une source d'énergie radiofréquence； la source d'énergie radiofréquence est connectée électriquement à un élément d'ablation (210, 210a, 210b, 210c, 210d, 210e, 210f) du dispositif de septostomie auriculaire (20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i) au moy
