The article studied the influence degradation factors of phenol wastewater by ultrasound. This factors include of ultrasonic device,ultrasonic frequency,ultra sound,wastewater pH and initial concentration. The results showed that the amplitude type ultrasonic is greater than the slot type ultrasound. Low - frequency ultrasonic degradation rate of phenol is greater than the high frequency ultrasound. The degradation of phenol wastewater treatment rate and ultra sound is corresponding to relationship. With the increase of solution pH,phenol degradation rate increased gradually. The degradation of phenol is decreases with the increase of initial concentration of reaction solution.%文章研究了超声在降解苯酚废水过程中的影响因素，包括超声装置、超声频率、超声声强、废水 pH 值及初始浓度的影响。发现变幅杆式超声大于槽式超声，低频超声对苯酚的降解率大于高频超声；苯酚废水的降解率与超声声强成正对应关系；随着溶液pH 值的升高，苯酚的降解率逐渐增大；苯酚的降解率均随着反应溶液初始浓度的增加而减小。
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