wearable electronics and are classified into four categories according to their sensing mechanisms: piezoresistive, capacitive, piezoelectric, and triboelectric. [6][7][8][9] Compared to the other pressure sensors, the piezoresistive pressure sensor constructed from flexible substrates and conductive materials is considered the most promising for industrialization. [10] This benefit from the fact that the piezoresistive pressure sensor has the advantages of reliable sensing performance, low costs, less susceptibility to external environmental interference, and relatively low energy consumption. [11] Much progress has been made in previous research into the piezoresistive pressure sensor, and much of these works have been aimed at improving the sensitivity, sensing range, and stability of the sensor. [12] Particularly in the area of human movement and physiological monitoring, highly sensitive pressure sensors enable continuous monitoring of health states by acquiring the body's vital signals in real time, which is essential for future personalized medicine and diagnosis. [13] To enhance the sensitivity of pressure sensor, the introduction of superior conductive materials on flexible substrates with surface-built microstructures has proven to be an effective strategy. [14] This is because the construction of various microstructures or nanostructured geometries in flexible substrates can increase the degree of change in their contact resistance under pressure loading, thereby improving the sensitivity of pressure sensors. [15] Micro-pyramidal structures, micro-pillar structures, micro-hemispheric structures, micro-cone arrays, and hollow sphere microstructures have been published in previous research works, and these pressure sensors show high sensitivity. [16] Park et al. [17] have constructed micro-hemispheres, micro-pyramids, and micro-cylinders on the surface of polydimethylsiloxane(PDMS), and then deposited carbon nanotubes (CNT) to prepare compressible conductive CNT/PDMS films. The finite element theoretical model is used to analyze the contrast sensitivity, and it is found that the tunnel resistance can be greatly reduced due to the maximum change of contact area of the interlocking array based on micro-hemispherical structure under the same The introduction of superior conductive materials on flexible substrates with surface-built microstructures has proven to be an effective solution for enhancing the sensitivity of pressure sensor. Thermoplastic polyurethane electrospun membrane (TPUEM) with multi-void structure is used as substrate, and poly(styrene-methacrylic acid)@polypyrrole nanospheres (PPNs) are pumped into the TPUEM by vacuum filtration to form a microstructure on the surface of thermoplastic polyurethane (TPU) electrospun fibers. The MXene dispersion is sprayed on the surface of PPNs/TPUEM. As it is gradually infiltrated into the material, a conductive network is formed. When the MXene/PPNs/TPUEM is subjected to pressure, its resistance decreases significantly due to the close contact between MX...