Abstract: The present disclosure provides a magnetic suction building block, including a building block main body, which is formed by a plurality of side walls in mutual connection, a crossed corner is formed at a joint between every adjacent side walls, a compartment is disposed at the crossed corner, and a magnet is disposed inside the compartment; and the magnet may rotate in the compartment, and the magnet is provided with a N pole and a S pole. Compared with the existing technology that the magnetic suction building blocks can only be stacked on the same axis, the building mode and playing method of the magnetic suction building block are greatly enriched, so as to help children built more modelings, and greatly improve the children's interest in building and modeling and help develop the children's imagination.