A novel headstand pyrocarbon cones (HPCs) with hollow structure was developed at 650-750 ℃ by the electromagnetic-field-assisted chemical vapor deposition.It is observed that the HPCs can form on the surfaces of pyrocarbon layers deposited in advance on carbon fibers which were used as the reinforced material to form carbon/carbon composites.The fine microstructures of the HPCs were characterized by high-resolution transmission electron microscopy.The results showed that the HPCs, which textural features directly transfer from turbostratic structures in roots to a well-ordered high texture in stems, were deposited onto the substrate surfaces.And the degree of high texture ordering decreases gradually from the stem to the tail in the HPCs.The formation mechanism of the HPCs was inferred as the comprehensive effect of polarization induction on electromagnetic fields and particle-filler property under disruptive discharge.