Shilong Single Cylinder Hydraulic Cone Crusher Piston is a single-cylinder hydraulic cone crusher hydraulic cylinder liner with good wear resistance, processability, dimensional stability, self-damping and high compressive strength, and good plasticity, toughness, and hardness. The hydraulic cylinder liner is made of ductile iron, and the upper part of the hydraulic cylinder liner has an inner concave to form a step, and the upper cylinder wall of the inner concave to form the step is opened with an upper oil passage through hole, and the lower part of the hydraulic cylinder sleeve is formed with a sealing groove and a lower oil passage. The characteristics are: First, it not only achieves the purpose of self-lubrication of the hydraulic cylinder liner, but also plays a role of self-vibration, avoids the occurrence of cylinder holding, and ensures the normal operation of the single-cylinder hydraulic cone crusher; second, the processing cost is low. It is easy to replace and has achieved unexpected economic and social benefits.