本文研究了超声振动式光纤切断器用新型压电振动刀具的机械阻尼特性、振幅特性及频率特性，并研制了光纤切断器实验样机，在此基础上对影响切断质量的几个主要参数用正交实验法进行了优化实验。优化后的实验样机与进口光纤切断器切出的光纤端面主观质量非常接近，达到预期效果。 In this paper, the mechanical damping characteristics, amplitude characteristics and frequency characteristics of a new type of piezoelectric vibration tool used in ultrasonic vibratory fiber cleaver are researched. The experimental prototype of fiber cleaver is developed. Based on this, several main parameters affecting the cutting quality are orthogonal Experimental method was optimized experiment. The optimized experimental prototype is very close to the subjective quality of the optical fiber end face cut by the imported optical fiber cutter to achieve the expected result.