The complex of semiflexible polyelectrolyte chain with oppositely charged particles and its stretching properties were studied with Langevin dynamics simulation. Attention is focused on the effect of particle charge and salt concentration. When there is no external force, the complex exhibits a beads-on-a-string configuration at low salt concentration and an aggregate configuration at high salt concentration. When external force is applied at the two ends of the chain, the particles unwrap from the chain in two steps with the increasing force.