The utility model discloses a public road bridge roof beam hydraulic pressure heel post, the on -line screen storage device comprises a base, the upside of base is seted up flutedly, the inside of recess is equipped with the shock pad, the upside of shock pad is also seted up flutedly, be equipped with the backup pad in the recess of shock pad, be equipped with the motor in the middle of the upside of backup pad, the upside of backup pad still is equipped with the support, the upside of support is equipped with the gyration and supports, the upside that the gyration was supported is equipped with the rotor plate, the output of motor and the downside intermediate junction of rotor plate, the upside of rotor plate is equipped with the hydraulic pressure cylinder, the upper end of hydraulic pressure cylinder is equipped with the connecting plate, be equipped with folding dust cover between connecting plate and the base, the upside of connecting plate is equipped with the cylinder, the upper end of cylinder is equipped with a support, the both ends that held in the palm on the top are equipped with the cavity, be equipped with the roof in the cavity, the below that held in the palm on the top is equipped with the crossbeam, be equipped with the slider on the crossbeam, the upper end of slider is connected with the stand, the upper end and the roof connection of stand. The utility model discloses simple structure, convenient to use, just with the support, stable in structure, long service life.