An electrophysiology ablation device includes a catheter sleeve (1), an electrode sleeve (2), a steering ball sleeve (4), a central rod (6), an ablation electrode (3) and a steering ball (5). The catheter sleeve (1), the electrode sleeve (2), the steering ball sleeve (4) and the central rod (6) are muff-coupled together, and the steering ball (5) can be deployed radially to define a meshed spherical shape, in order to steer the positioning of the ablation electrode (3) which can be deployed to define a meshed disk shape, so the ablation electrode (3) can be positioned at the ostium of the pulmonary vein accurately.