The invention steel mill rolling degradation of the roll (Roll) and the bearing mounted roll block (Roll Block) equipped with amenities such as repair work upon overhaul of the roll and bearings are normally driven sure whether before field put the repaired roll It relates to a roll driving device which is used to pre-test check OK. The present invention both with and test roll cradle, a drive motor, in the roll drive test apparatus for use in steel mill rolling equipment that is configured to include a test device control panel, wherein the holder is dependent upon the rear part and the front part of the bottom part 100, respectively, roll gojeongteul blocks (3) in each vertical upward and dolseol; And covering the top of the right and left rolls gojeongteul block (3), fixing screws (3-1) of the lower roll gojeongteul block (3) and the upper fixed plate (4) which is fixed by; Gojeongteul the rolling block (3) The roll gap adjustment block attached to each frame (7) and; The front part and the rear part formed with two rolls each block gojeongteul (3) Heavy screw jack fixed base portion 11 of the plate and formed in between; The front part and the screw jacks (8) provided on the rear part of the screw jack fixed base (11) and; The front portion and the rear screw jack screw connecting the jack, characterized in that the stem is configured to include a screw jack (10) for fixing. According to the present invention as described above, if there is a repair, replacement of the roll block contains a roll or bearing block being used for such as rolling in the steel mill, the entire drive state such as roll and bearing by using a test apparatus of the present invention in advance because you can see, it is possible to prevent the risks that lead to repair replacement roll and roll blocks, and production stoppages, etc. immediately put into scene, but also in advance by determining whether or not poor through the pre-tested repair, replacement, roll and roll blocks, etc. It may significantly reduce the number of times that causes a catastrophic failure. In addition, there is an effect that can maintain a stable production activity significantly reduce the production loss by preventing the production interruption. Gojeongteul roll block, the upper fixed plate, fixing screws, adjustment screws, spacing frame