Steel box girder paint spraying device facilitating manual operation

The utility model relates to the technical field of paint spraying devices, in particular to a steel box girder paint spraying device convenient for manual operation, which comprises a base, a paint bucket and a rotating column, a support block is arranged on the base, one end of the support block is connected with the base in a welding manner, and a turntable is arranged at one end of the support block far away from the base. A supporting plate is arranged at one end of the rotating disc, the rotating column is arranged on the side, away from the rotating disc, of the supporting plate, the two ends of the rotating column are connected with the supporting plate through rotating shafts, paint is sprayed to a steel box girder through a spray gun, and one end of the spray gun is driven by a first motor to move up and down with the rotating column as the circle center; paint spraying work is conducted on the whole area of the steel box girder till paint spraying is completed, paint spraying work on the steel box