The invention discloses a physical split phase supramolecular dynamic polymer, which contains a block polymer molecule with hard and soft segments simultaneously. The hard segments of the block polymer molecule can be mutually mixed to and/or independently form crystal phases and/or phases incompatible with the soft segments, thus forming split phase physical crosslinking and/or polymerization based on hard segments, and all the soft segments of the block polymer molecule are amorphous. At least one soft segment of the block polymer molecule contains at least one group/unit that can form dynamic supramolecular interaction. The dynamic polymer has shape memory function, self-repair function and super-toughness, and has wide application in biomedical materials, military, aerospace, energy, construction and other fields.