Staged fracturing of horizontal wells is essential for the effective development of tight sandstone gas reservoirs with low porosity and low permeability, and rational optimization of fracturing treatment parameters is fundamental. The conventional "one-well, one-design" approach has been widely used; however, field practice shows that the correlation between treatment parameters and fracturing effectiveness under this approach is weak. The influence of individual parameters on stimulation performance remains unclear, and the method cannot accommodate the coexistence of multiple reservoir types in strongly heterogeneous tight sandstone gas reservoirs. Taking the JH block of the Jinqiu gas field as the study area, this paper proposes a new concept of "one-stage, one-design, segmented optimization" that considers reservoir quality and sandbody distribution. Following an integrated geology-engineering approach, an efficient design method for optimizing fracturing parameters in horizontal wells in tight sandstone gas reservoirs is established, including reservoir-type-specific optimization, treatment-stage classification, and target-well parameter optimization. A standardized design workflow that can be rapidly reused for different reservoir types is also developed. The results show that, compared with the conventional method, the proposed optimization method shortens the single?well fracturing design cycle by 50%-60%, reduces single?well fracturing cost by 10.6%, increases the post-fracturing stable-production period by 58.3%, and improves estimated ultimate recovery (EUR) by 15.6%. The method can effectively improve the scientific rigor and efficiency of fracturing-parameter optimization in strongly heterogeneous tight sandstone gas reservoirs and provides practical guidance for fracturing stimulation and development-benefit enhancement in reservoirs similar to the JH block.