Abstract: In order to study the fluidized effect of the pulsed fluidized bed, a comparison experiment was conducted on the fluidized characteristics of the pulsed flu idized bed and the conventional fluidized bed under the conditions of the different pulsed air parameters and the analysis was conducted on the fluidized curves, the be d layer pressure drop of the fluidized bed and the density fluctuations at the center of the fluidized bed individually.The results showed that when the pulsed fluidized be d was in critical fluidization status, the pressure drop variation of the fluidized bed was stable and the fluidized curve could not appear a raised peak.The middle bed lay er pressure drop fluctuations of the pulsed fluidized bed was obviously lower than the conventional fluidized bed and the stability of the bed density would be high.At th e same fluidized number, the pulsed fluidized bed would have much lower bed density.