Abstract: Flexible piezoresistive pressure sensors have garnered widespread attention due to their excellent performance, flexibility, and promising applications in fields such as health monitoring and electronic skin. However, existing flexible piezoresistive pressure sensors often face challenges of reduced sensitivity and inadequate linearity across a wide range of pressures. This paper reviews the latest advancements in flexible piezoresistive pressure sensors, focusing on effective strategies to enhance sensor performance by expanding the linear response range through hierarchical porous structures, hierarchical microstructures, and material synergy. Research findings demonstrate that optimizing sensor design and material selections are crucial for improving overall sensor performance. Additionally, this paper explores future trends in the development of flexible piezoresistive pressure sensors, proposing future research directions such as multifunctionality, the application of intelligent manufacturing technologies, and the development of biocompatible materials, to provide theoretical support for further advancements in the field.