A stroke erasing method, a terminal device, and a computer-readable storage medium are disclosed. The method may include: determining an intersecting stroke on an electronic whiteboard that intersects with an erasing region; traversing each of collection points of the intersecting stroke to determine whether a line of connection between each two adjacent ones of the collection points intersects with the erasing region; determining, in response to the line of connection intersecting with the erasing region, an approximate intersection point between the line of connection and the erasing region by means of midpoint recursion; and splitting the intersecting stroke into segments according to the approximate intersection point, and drawing the segments not erased by the erasing region.