Energy-saving, environment-friendly and long-life piston ring of internal combustion engine

Relates to the technical field of internal combustion engine piston rings, and discloses an energy-saving, environment-friendly and long-life internal combustion engine piston ring which comprises a ring body with an end opening, an upper tower opening is formed in one end of the opening of the ring body, a lower tower opening is formed in the other end of the opening of the ring body, and an upper guide rod is arranged at one end of the upper tower opening. An upper guide hole is formed in the opening end of the ring body and located on the opposite face of the upper tower opening, and a lower guide rod is arranged at one end of the lower tower opening. The piston ring is simple in structure, during actual use, the upper tower opening and the lower tower opening at the opening of the ring body can be meshed with each other, so that the ring body is located in a closed piston ring, the upper guide rod can slide in the upper guide hole, the lower guide rod can slide in the lower guide hole, dislocation between