The utility model discloses an interior buckling -restrained energy dissipation support who fills high polymer of high expansibility, including the steel pipe, the last port and the lower port of steel pipe all are equipped with closed steel sheet, be provided with the support column that the high polymer two -component polyurethane of high expansibility constitutes in the steel pipe, go up the closed steel sheet of port and offered first mounting hole and second mounting hole, be provided with the slip casting pipe in the first mounting hole, the outer port of slip casting pipe is equipped with closed nut, , which comprises a steel pip, the one end that air discharging guide pipe is in the steel pipe outside is equipped with the constriction structure, the pressure release hole has been seted up on the neck ring of constriction structure, the cover is equipped with the sealing glue circle on the pressure release hole, it connects otic placodes to be equipped with two respectively on the closed steel sheet of last port and lower port, all be provided with the connecting hole on the connection otic placode. The utility model discloses simple structure, it is convenient to make, install, and the support column that two -component polyurethane constitutes can guarantee that the steel pipe can not produce the indent bucking when the pressurized, can realize the full power consumption function of pressurized curve.