The amorphous boron powders were agglomerated to high-intensity spherical particles by means of mechanical mixing with hydroxyl terminated polybutadiene as raw materials and with acetic ether as solvent. The factors affecting the intensity of particles during the agglomerated process were analyzed. The optimal process conditions were obtained: the rotation speed is 90 r·min ^-1; the agglomerated process temperature is 30 ℃; the mass ratio of binder and amorphous boron powder is 10/90 and the mass content of solidification catalyst is 0.02%; the morphological structure of agglomerated boron particles prepared by the method is preferable and the intensity of particles is higher.