Cavitation airfloat is a newmethod dealing with the control of water pollution.Compared with the tradi tional method -compressed air float.This method works wi thout using the equipment such as air-liquefaction,air compressor,hig h pressure water pump,reaction and aeration tank.In addition,it is characterist ic of having smaller cubage,taking smaller space and power-saving.The application of caviation airfloat to wastewater control of waste paper utilization in paper reproduction is described.