The utility model provides a filling device for crack prevention in highway bridge box construction. The filling device for highway bridge box construction crack prevention comprises a feeding mechanism. A shielding mechanism; vibrating mechanism, the vibrating mechanism is fixedly connected to the bottom of the feeding mechanism; the first fixed column is fixedly connected to the bottom of the feeding mechanism; the second fixed column is fixedly connected to the first fixed column; the roller is rotationally connected to the second fixed column; the roller is arranged on the outer side of the second fixed column; the bottom of the protrusion is fixedly connected to the outer side of the roller, the top of the protrusion abuts against the bottom of the connecting plate, one end of the fixing plate is fixedly connected to the top of the connecting plate, one end of the spring is fixedly connected to the fixing plate, and the vibrating plate is fixedly connected to the other end of thefixing plate. The filling device for crack prevention of highway bridge box construction has the advantages that poured concrete can be directly vibrated, and therefore working time is saved.