The utility model discloses a floating support, including wheel components, gyro wheel case, lifter, adjusting nut, fixation nut, stop screw, base and round pin axle, wheel components installs on the gyro wheel case, and the lifter upper end is connected through round pin axle and the lower part rotation of gyro wheel case, and it is vice that the lifter lower extreme passes adjusting nut in proper order, fixation nut constitutes the screw -nut transmission, and the relative fixation nut of adjusting nut rotates, and fixation nut fixes on the base lower part. The utility model discloses a holding control of a pair of gyro wheel center height can effectively prevent to lead to the fact the damage problem of gyro wheel bracket component because of the swing of work piece afterbody. The utility model is simple in operation, reduce the number of times of changing the gyro wheel, reduce maintenance, the replacement cost usefulness of gyro wheel, prolonged life.