Abstract: Fracturing operations, as the main way of oil and gas extraction, storage and production increase, play the extremely important role in conventional oil and gas well renovation, unconventional oil and gas well completion, production increase, improving oil and gas production efficiency, and ensuring national energy security. As the core and key product of fracturing equipment in fracturing operations, the fracturing pump aims to improve the service life, reliability, stability and continuous working time of the fracturing operations. Structural optimization design and connection performance improvement around the connecting part of the key core component of the fracturing plunger pump, the connecting rod small head, and the cross head is conducted so as to significantly improve the overall bearing capacity, connection strength, stiffness, and connection reliability of the connecting rod component. The reliability and stability of the structural optimization operation are effectively verified through actual operations on the fracturing site; it improves the continuous operation time of fracturing and achieves improvement in oil and gas production efficiency.