Supporting cylinder with pressure stabilizing function

The utility model relates to a supporting cylinder with a pressure stabilizing function, and belongs to the technical field of machine clamping equipment. The supporting cylinder with the pressure stabilizing function comprises a cylinder barrel, a piston head, a sliding sleeve, an oil inlet end cover, a connecting base, a jacking piston, a piston rod and an upper buffer spring. An oil inlet end cover is arranged at the lower end of the connecting seat; a cylinder barrel is fixedly mounted at the upper end of the connecting seat; a sliding sleeve is movably arranged in the cylinder barrel; piston heads are mounted at the top ends of the sliding sleeves; the piston head extends to the outer end of the cylinder barrel; the lower end of the sliding sleeve is slidably connected with the upper end of the connecting base. A piston cavity is formed in the connecting seat; an oil path control mechanism is arranged on the connecting seat and the cylinder barrel on one side of the piston cavity; and a piston rod is arr