Piston structure and high-pressure oil cylinder

The invention provides a piston structure and a high-pressure oil cylinder, and relates to the technical field of oil cylinders, and the piston structure comprises a piston main body and a plurality of sealing rings mounted on the piston main body. The piston body comprises a first end face, a second end face and a peripheral side face located between the first end face and the second end face. The multiple sealing rings are arranged on the peripheral side face of the piston body at intervals. A pressure oil duct is arranged in the piston main body; the pressure oil duct is provided with oil duct openings in the first end face, the second end face and the peripheral side face between the adjacent sealing rings; a damping valve unit used for reducing the pressure of oil in the oil duct is further arranged on the pressure oil duct so as to adjust the pressure difference between the two sides of the sealing ring in the working process. According to the piston structure, the whole piston structure can bear high-p