The invention discloses a shock wave therapy instrument with a replaceable water bladder structure, which relates to the technical field of medical equipment, and comprises a main body. Support blocks are connected to both sides of the main body, and a hydraulic cylinder is connected to the bottom of the support block. The hydraulic cylinder The bottom of the base is connected with a base, and the bottom of the base is connected with rollers, the inner bottom of the main body is connected with a slide rail, and the top of the slide rail is connected with a bottom plate, the top of the bottom plate is connected with an impact component, and the top of the impact component is connected There is a water bag, a door is connected to one side of the main body, and the main body is connected to the door through a hinge. In the present invention, the purpose of adding a hydraulic cylinder is to enable patients with short stature and mobility problems to be treated easily, reduce the inconvenience of patients receiving treatment, and at the same time lift through the hydraulic cylinder, and the hydraulic cylinder is fast in the lifting process without large Noise, stable operation, will not delay for a long time, affecting patients receiving treatment, hydraulic cylinders are only running for patients in need.