A safety seat apparatus includes a seat and sliding rails, wherein, the seat are connected on the sliding rails, the sliding rails are rack bar type sliding rails, rollers meshed with the rack bars of the sliding rail are provided on the upper and lower parts of the sliding rails, and a thrust unit is provided at the front end of the sliding rails. The sliding rails are converted into rack bar type sliding rails, rollers are mounted on the upper and lower parts of the sliding rails under the precondition that the sliding rail height and seat journey are not changed, and the rack bar sliding rails are fixed by the rollers. A thrust unit is provided at the front side of the sliding rails, the fore part of the thrust unit inserts the chassis carling of the vehicle chassis, to lift to the lower bent carling position at the front section of the front baffle plate, and is connected and fixed with the lower bent carling through bolts. When collision occurs at the vehicle, the carling and the lower bent carling are squeezed to rapidly shift back, when the lower bent carling is squeezed, the thrust unit is squeezed to rapidly shift back to push the sliding rails, and the sliding rails are rolling with the rollers through the gears, thereby pushing the seat to rapidly shift back, to achieve the object of controlling the collision space and protecting occupant safety.