Boron （B）-based composite energetic materials， renowned for their high energy density， are employed in explosives and propellant formulations. In this study， B/ammonium perchlorate （AP）/polyvinylidene fluoride （PVDF） composite energetic microspheres were synthesized using an emulsion-solvent evaporation method， with different PVDF mass fractions （5%， 10%， 15%， and 20%）. The surface morphology of the prepared microspheres was characterized via scanning electron microscopy （SEM）. To evaluate their combustion behavior， a suspension combustion test was performed using an ultrasonic levitation laser ignition system. Through real-time diagnostics of micro-explosive combustion phenomena， the optimal PVDF content for the enhanced combustion performance was determined. The results revealed that the prepared microspheres possessed a near-spherical morphology and exhibited a three-stage combustion process （developing combustion stage， stable combustion stage and decreasing combustion stage）， which was also accompanied by micro-explosions. Among the formulations， the microspheres with 10% PVDF demonstrated the most favorable combustion characteristics， exhibiting the largest flame area and brightness， the highest BO₂ emission intensity （11291.8 counts）， the greatest BO₂ peak area integration （12856.8）， and the highest surface combustion temperature （1243.8 ℃）. These results indicate that the B/AP/PVDF microspheres exhibit optimal combustion characteristics and energy release performance at a PVDF content of 10%.