Addressing the challenge of accurately locating oblique cracks due to misjudgments of defect positions in single-probe electromagnetic ultrasound omni-directional guided wave detection, a two-probe circular fitting crack localization method based on tangent approximation is proposed. This method uses the electromagnetic acoustic transducer (EMAT) detection position point as the center of a circle and the acoustic range of the crack echo signals as the radius. By performing circular fitting at multiple different locations, a set of circle collections is obtained, allowing for the discrimination between true and false defect locations. The double-probe data compensation method is employed to obtain two sets of circles at different locations. By identifying the common tangent line of these two sets of circles, pseudo-tangents are removed, enabling accurate crack positioning and detection. Results show that the dual-probe circular fitting crack localization method effectively eliminates pseudo-tangents compared to the single probe, achieving a maximum crack localization error of 2.3%. This provides a reliable basis for accurate oblique crack detection.