The utility model discloses a steamed stuffed bun skin machine drive mechanism, including speed governing speed reducer, squeeze roll, the adjustable roll of pressure face, the fixed roll of pressure face, forming roller, transport drive roll, hairbrush shaft no. 1 and hairbrush shaft no. 2. The utility model discloses utilize the speed governing speed reducer to realize stepless speed control, through chain drive and gear drive realization power transmission, whole structure of transmission mechanism is compact, the transmission is steady, the noise is low, occupation space is little, has reduced the processing of spare part, therefore simple to operate, simultaneously low in manufacturing cost.