The utility model relates to a speed reduction box device for a self-adhesive rotary printing machine, which is composed of a box body, a box cover, a separating ring, nuts, gaskets, a driving core shaft, bearings, a sleeve ring, gears, an end cover of a bearing seat, a bearing press cover, an oil seal, a main drive gear, nuts, gaskets, a right lining sleeve, a left lining sleeve, a lower drive core shaft, a lower lining sleeve, a lower oil seal, a pressing cover of lower bearings, lower bearings, an oil scale and an O-shaped seal. The utility model is characterized in that the gears are turbines. The utility model has the advantages of simple and compact structure, small volume, light weight, low noise and strong overload capacity.