Separating type multi-stage friction damping support

The invention provides a separated multi-stage friction damping support, and belongs to the technical field of bridge supports. The support comprises an upper support, a middle cover plate, a spherical crown lining plate and a lower support which are sequentially overlapped, the upper support is in sliding fit with the middle cover plate, the middle cover plate is in sliding fit with the spherical crown lining plate, and the spherical crown lining plate is in running fit with the lower support; an injection channel is formed in the spherical crown lining plate and used for injecting lubricating liquid, and an injection outlet of the injection channel is located in the side, facing the middle cover plate, of the spherical crown lining plate. The injection port of the injection channel is formed in the side, facing the middle cover plate, of the spherical crown lining plate, so that the lubricating liquid can lubricate the oppositely-arranged surfaces of the spherical crown lining plate and the middle cover pla