The utility model relates to a revolving stage is used in test of sound scattering coefficient, including rotating platform and centre of turning circle axle, its characterized in that: revolving stage is used in test of sound scattering coefficient be rack roller type structure, rotating platform is diameter 3m's steel rotating circular disk, and pivoting part adopts the gyro wheel, relies on the rolling friction drive of gyro wheel the rotating circular disk rotate, the rotating circular disk bottom surface be equipped with with the endocentric ring type recess of rotating circular disk, inner ring radius of circle 0.8m, outer loop radius of circle 1.3m is equipped with four group's roller trains on the beneath groined type rack of rotating circular disk, every group roller train is equipped with two pair inside and outside totally four gyro wheels, in the inner ring circle recess of two gyro wheels embedding rotating circular disks of the inboard in the nearly rotating circular disk centre of a circle of every group roller train, in two gyro wheels embedding rotating circular disk outer loop circle recesses in the outside, through four group's roller trains totally 16 rolls of gyro wheel in the recess of rotating circular disk drive the rotating circular disk and produce and rotate.