Abstract: Due to the low porosity and extremely low permeability of shale reservoirs, they must undergo large-scale volume fracturing to create an artificial fracture network. The development of the Nanchuan normal pressure shale gas has already formed a relatively mature fracturing technology system. However, with the scale production of sweet spot reserves, there is an urgent need for in-depth research and further improvement of fracturing technology. This paper proposes improvement ideas and methods for the hydraulic fracturing process of the Nanchuan shale gas field, including the utilization of reserves in different well networks, perforation methods, temporary plugging with ball-injection, and sanding modes. The feasibility of these improvements is evaluated through on-site application effects assessment. The feasibility of the improved technology is evaluated through on-site application results. Differential control of fracturing and transformation areas for different types of well groups, considering variations in well network relationships and development objectives. The application of ultra-deep penetration perforation provides a crucial technological foundation for fracturing in deep, high-stress shale reservoirs, meeting limitations on the number of electric fracturing devices and pressure levels. Borrowing techniques from repeat fracturing and balling during tight well fracturing processes, optimizing the quantity and timing of balling to suppress excessive extension of the main fracture. Fine-tuning the fracturing process and optimizing the proppant system, leading to a well-developed three-level continuous sanding model: "initial small particle size long-distance transport front-end placement + mid-section medium particle size main flow channel support + tail-section large particle size fracture mouth closure." The improved hydraulic fracturing process has shown significant on-site application effects. In the statistically analyzed on-site temporary plugging with ball-injection, the effective plugging rate is close to 79.8%. Under the ultra-deep penetration technique, it has provided a pressure window for more sanding and fluid injection. Increasing the sanding intensity and the proportion of fine particles has significantly enhanced the fracture conductivity and support effect. As a result, the daily production after fracturing has increased from 33,000 cubic meters to 84,600 cubic meters. Studies have shown that the integrated application of differentiated fracturing design, ultra-deep penetration perforation technology, optimized temporary blocking with ball injection, and a refined three-stage sand addition model can significantly enhance the fracturing performance and economic benefits of the Nanchuan Shale Gas Field. This provides strong technical support for the efficient development of the field