The invention discloses an amphibious crane, which comprises: a crane arm, a truss, a telescopic upright post, a pull rod, at least two crawler structures and at least four supporting legs, wherein the crane arm is used for hoisting various objects; the truss is positioned below the crane arm and used for stabilizing a telescopic upright post; one end of the telescopic upright post is fixed on a chassis of the crane, while the other end is connected with the truss and the crane arm to support the truss and the crane arm; one end of the pull rod is fixed at the end part of the truss, while theother end is fixed on the chassis to balance hoisting; at least two crawler structures are arranged on two sides of the crane respectively and used for running of the crane; and at least four supporting legs are connected to the chassis and used for supporting the weight of the crane during hoisting; and the middle of the crawler structures is provided with a floating box. The invention also provides a crawler structure. The amphibious crane can adapt to operate in mudflat areas and shallow sea areas.