The invention discloses a stirring mechanism for an ink stirring cylinder. The stirring mechanism comprises an installation pipe, wherein the lower end of the installation pipe is provided with a stirring block, the peripheral surface of the stirring block is provided with a plurality of stirring strips, the stirring strip is provided with an opening groove, the bottom portion on the lower end of the installation pipe is provided with an installation block, the side walls of the installation block are provided with installation holes, a butting pipe is sleeved inside the upper end of the installation pipe, the lower end of the butting pipe is sleeved inside the upper end of the installation pipe, the upper end of the butting pipe is provided with a suspending ring, the suspending ring is provided with a sleeved installation pipe, the axial position of the sleeved installation pipe is provided with a sleeved installation groove, a protection spring is sleeved on the peripheral surfaces of the installation pipe and the butting pipe, the suspending ring is provided with a connection seat, and the sleeved installation pipe is arranged on the connection seat. According to the present invention, with the stirring mechanism, the installation pipe can be conveniently controlled to perform the horizontal rotation operation, and the stirring block and the stirring strips can conveniently perform the horizontal rotation adjustment; and through the stirring block and the stirring strips, the ink in the ink stirring cylinder can be conveniently and rapidly stirred.