Abstract: To investigate the effects of JP-10 blending on soot formation in aviation kerosene laminar diffusion flames, experimental studies were conducted based on Laser-Induced Incandescence (LII) and Planar Laser-Induced Fluorescence (PLIF) to analyze the spatial distributions of LII-soot signals and PLIF-PAHs (Polycyclic Aromatic Hydrocarbons) signals in JP-10 blended aviation kerosene flames. The experimental results show that with the JP-10 blending ratio increases, both the spatial extent and signal intensity of LII-soot and PLIF-PAHs enhance significantly, indicating that JP-10 blending can promote the formation of soot and PAHs. Furthermore, a kinetic mechanism suitable for studying PAHs formation in JP-10/aviation kerosene mixtures was developed. And then, a chemical kinetic simulation was carried out based on this mechanism. The simulation results indicate that JP-10 blending can enhance the primary formation pathways of benzene (A1), promoting the generation of fulvene (C₅H₄CH₂) and toluene (C₆H₅CH₃), thereby facilitating A1 production. This process subsequently accelerates the formation of PAHs and soot.