The invention relates to a shock wave generating system with hydraulic monitoring replenishment for cardiovascular stenosis, the shock wave generating system comprises a liquid medium, a hydraulic sensor, a shock wave generator, an operating handle, a catheter and a balloon, and an electrode pair is arranged in the balloon. The system can reach a target narrow position through a guide wire in a conventional interventional operation mode, after low pressure is applied through the balloon on the system to pre-dilate a blood vessel, the balloon is filled with a specific liquid medium, a generator of the shock wave generating system is controlled to apply shock waves to vibrate narrow blood vessels attached to the periphery of the balloon, hydraulic pressure in the balloon is detected through the hydraulic sensor, the liquid supply device supplements liquid media to maintain the hydraulic pressure in the balloon, the treatment effect is visually reflected, treatment parameters are adjusted in time, and better crushing of calcification lesions is achieved. Finally, the purpose of treating cardiovascular stenosis is achieved.