An experiment study of agglomerating fluidization behavior of three kinds of nano-particles (SiO2, TiO2, ZnO) in vibro-fluidized bed (VFB) has been performed. At certain amplitude (3 mm) of vibrations applied, the minimum fluidization velocity decreases, whilst the equilibrium pressure drop increases with increase in the vibration frequency. The minimum fluidization velocity is nearly independent of the vibration amplitude at almost constant frequency of about 40 Hz, whilst the equilibrium pressure increases. Using the linear regression, the Richardson-Zaki exponents of three kinds of nano-particles have been calculated. R-Z analyses indicate that the particulate fluidization degree of cohesive particles can be greatly improved by vibration force. (C) 2008 The Society of Powder Technology Japan. Published by Elsevier BV and The Society of Powder Technology Japan. All rights reserved.