1, suspension method: tie the thin wire to the highest point of the convex part to make it rotate freely in the horizontal plane. At rest, the end point in the north is the N pole.

2. Determine with a small magnetic needle: place a small magnetic needle with a known magnetic pole between the two poles of the shoe-shaped magnet, and the end pointed by the S pole of the small magnetic needle is the N pole of the shoe-shaped magnet.

3. Floating method: Put the sawdust that can make the hoof magnet float on the water surface and put the hoof magnet on the board. Under the action of geomagnetic field, the plate can rotate, and the magnetic pole located in the north at rest is the N pole.