The invention discloses an ink fountain stirring device of a metal sheet printing machine. The ink fountain stirring device comprises a rack, wherein a connecting unit is arranged at each of the two sides of the rack, and an air cylinder is arranged on the two connecting units; a transmission unit is arranged on a movable part of the air cylinder, and the transmission unit is provided with a carrier gear and an autorotation gear; a rack is further arranged on the air cylinder, and the carrier gear is meshed with the rack and the autorotation gear; the air cylinder drives the transmission unitto slide; a stirring head is arranged on a gear connecting shaft of the autorotation gear; and adjusting devices are arranged on the air cylinder and the transmission unit correspondingly. The intervention angle of the stirring head is adjusted by means of the adjusting devices, the transmission unit is driven to slide by the air cylinder, the carrier gear rotates on the rack therewith, the autorotation gear meshed with the carrier gear rotates therewith, then the stirring head is driven to rotate, and the stirring head rotates while moving in the axial direction, so that stirring of printingink is more sufficient and uniform, printing ink skinning are prevented from being wasted, the generation of ink skin is reduced fundamentally, and the misconducted ink skin is prevented from polluting environment.