The utility model relates to a burden poisson's ratio honeycomb's expansion joint device, including a plurality of roof beam of the bridge body, be provided with the layer of mating formation in roof beam body top, leave the clearance between the beam-ends of the adjacent roof beam body, install the honeycomb who has the negative poisson's ratio who links to each other with the beam-ends in the clearance, honeycomb's top is provided with an asphalt cement that connects with with the layer of mating formation, and the upper surface on the upper surface of asphalt cement and the layer of mating formation flushes. The utility model discloses a honeycomb that the installation has the negative poisson's ratio contracts when the pressurized, expands when being drawn, and in roof beam body clearance, honeycomb possesses certain bearing capacity horizontal and vertical simultaneously, so both can satisfy the vertical extension factor (EF) between the adjacent beam-ends, has the relative changing of the relative positions that sufficient restraint prevented that the roof beam from personally experiencing sth. Part of the body again. Through setting up the asphalt cement, it passes through to guarantee that the vehicle is smooth-going, has the drainage of preventing function simultaneously. The utility model has the advantages of simple structure, and durability, elasticity are good.