The utility model discloses a reducing furnace bell jar rotary device, which comprises a motor, the motor upper end is connected with the pivot, the horizontal rotation platform has been cup jointed to the pivot bottom, horizontal rotation platform top fixed mounting has support wing, there is frock clamp on horizontal rotation platform top through a set screw fixed mounting, arc card strip is installed to the frock clamp inside wall, open at arc card strip inside wall middle part has perpendicular groove, it is equipped with the sucking disc to erect the inslot end, it is stupefied that arc card strip inside wall is equipped with the antiskid, frock clamp the inner is equipped with the rubber clamp splice, the frock clamp inner chamber is equipped with the reducing furnace bell jar. The utility model discloses a set up horizontal rotation platform, support wing, frock clamp, arc card strip, sucking disc, the stupefied and rubber clamp splice of antiskid, can provide a stable sprayingenvironment for the rotatory spraying operation of reducing furnace bell jar, move stable, easy and simple to handle, easy realization, have the production practicality.