本文主要探究了插有细管的超声波水浴内的冲流压分布，对超声毛细现象进行了解释.管内液面上升的原因有表面张力与空化效应生成的空化泡溃灭时产生的冲流压.我们通过COMSOL模拟了水浴内超声波声压分布，并基于MATLAB计算了不同声压幅值条件下空化泡半径及其变化率随时间的变化情况，积分计算了冲流压的大小.实验中通过改变细管底部位置，探究冲流压大小对液面上升高度的影响，与理论曲线相比较，很好地解释了超声毛细现象，实验结果与超声空化理论相符合.

 In this paper, the impulse pressure distribution in the ultrasonic water bath with a thin tube is mainly explored and the ultrasonic capillary phenomenon is explained. The reasons for the rise of the liquid level in the tube are the impulse pressure generated when the cavitation bubble generated by the surface tension and cavitation effect collapses. We simulated the distribution of ultrasonic sound pressure in the water bath by COMSOL, calculated the cavitation bubble radius and its change rate with time under different sound pressure amplitude conditions based on MATLAB, and calculated the magnitude of the impulse pressure in integration. In the experiment, by changing the position of the bottom of the thin tube, the influence of the punching pressure on the rising height of the liquid level was explored, and the ultrasonic capillary phenomenon was well explained compared with the theoretical curve, and the experimental results were consistent with the ultrasonic cavitation theory.