In this paper, the principle of polarization and alignment motion of wooden particles were stated, and the relationship between average alignment angle and some factors concerned such as electrostatic field intensity(E), moisture content of particlc (MC), particle geometries (G), and hight of electrode plates (H) were revealed. The results obtained from the study showed:* 1. The free ions and polarized ions are primary factors causing wooedn particles to be polarized and aligned.*2. Field intensity and moisture content of particles have a significant effect on the particle alignment; the higher the field intensity were, the smaller the average alignment angle.*3. When the field intensity is over 4KV/cm, the average alignment angle rapidly worsen. The main cause for this phenomenon is point discharge in wooden particles.*4. About 19°alignment angle is obtained at 4KV/cm field intensity (E)