Abstract: Experiments of continuous liquid spraying in a Φ300 G-S fluidized bed were performed．Fluidizing quality and heat transfer characteristics in liquid spraying condition were studied using polyethylene particle and hexane as media.The influences of fluidizing velocity,distribution plate，liquid feed and method on heat transfer coefficient and liquid vaporization rate,the relation between heat transfer capacity and mass of spraying liquid were analyzed．The maximum vaporization speed of liquid in given condition was derived theoretically.