As an important part of ultrasound medicine, interventional ultrasound plays an irreplaceable role in clinical diagnosis and treatment. Interventional ultrasound not only refers to various diagnostic and therapeutic techniques of puncture and drainage under ultrasound guidance, but actually also includes intraoperative ultrasound, transcatheter ultrasound, ultrasonography CEUS, etc. I. Ultrasound-guided puncture biopsy, fluid aspiration, drainage, tube placement, etc. 1. Puncture biopsy: With the continuous improvement of automatic ejection biopsy technology, ultrasound-guided percutaneous puncture biopsy is widely used in clinical practice. Such as the chest, abdomen, pelvis, soft tissue and other lesions, as long as the lesions can be displayed by ultrasound, basically can be applied. Features: precise material selection, good specimen quality, small trauma, safety, and has become a routine method to obtain histopathological diagnosis under non-surgical conditions in the clinic. 2.Puncture and drainage: such as percutaneous hepatic cholangiopancreatography with tube placement and drainage, ultrasound-guided cholecystostomy, percutaneous pyelopancreatography and nephrostomy, thoracic, pelvic and abdominal abscess puncture and aspiration and tube placement, persistent thoracoabdominal fluid puncture and aspiration and tube placement, etc. Intraoperative ultrasound The scope of application: from brain, heart, kidney, liver and biliary surgery, expansion to the spine, blood vessels, pancreas, thyroid and almost the entire field of surgery. Features: Intraoperative ultrasound probe generally has high frequency to improve the sensitivity of lesion display, not only limited to the diagnosis of lesions, but also plays an irreplaceable role in guiding intraoperative puncture, resection and other treatments. It can reduce both unnecessary normal tissue removal and ensure that the lesion tissue that should be removed is not missed. Third, trans-cavity ultrasound: such as trans-cavity urinary tract ultrasound, trans-cavity gastrointestinal ultrasound, trans-rectal prostate ultrasound, trans-vaginal ultrasound, etc. Features: By applying high-frequency probe to increase the resolving power, while imaging the probe to the vicinity of the observed organs, artifacts caused by bone, obesity and intestinal gas interference can be excluded, thus making the image clearer. Ultrasonography: such as abdominal organ ultrasonography, myocardial ultrasonography, cardiac cavity ultrasonography, gastrointestinal ultrasonography, etc. Features: The evaluation of tissue structures such as cardiovascular system and abdominal organs through peripheral intravenous contrast injection effectively improves the ability and scope of ultrasound diagnosis and differential diagnosis, improves the lack of sensitivity and specificity of ultrasound diagnosis, and further expands the scope and application potential of clinical ultrasound diagnosis. V. Ultrasound-guided treatments 1. Ultrasound-guided chemical solution injection for tumors: such as percutaneous alcohol injection for liver tumors, percutaneous alcohol injection for sclerosis for liver and kidney cystic lesions, etc. 2.Ultrasound-guided microwave, radiofrequency and freezing ablation treatment for substantial organ tumors, especially liver cancer. 3.High-intensity focused ultrasound for tumor treatment Features: precise positioning of ultrasound-guided interventional treatment, real-time monitoring of treatment process, mild trauma, significant effect and small side effects. At present, it is more mature in both theory and technology, and follows the trend of minimally invasive clinical treatment. Minimally invasive, safe and effective is the direction of modern medical development. With the major advances and breakthroughs in medical technology, new vitality has been injected into the development of ultrasound medicine, which has greatly promoted the development of interventional ultrasound diagnosis and treatment technology and made ultrasound medicine play a more important role in clinical practice.