Ultrasound of the liver can detect tumors. Ultrasound can explore substantial organs, and the liver is a substantial organ. ultrasound is currently the preferred method for liver cancer screening, and can detect occupying lesions with a diameter of >1cm in the liver and understand the number of tumors, their size, and whether they have invaded and metastasized. Using Doppler effect or ultrasound contrast agent, it can understand the blood supply status of the lesion and determine the benign or malignant nature of the occupying lesion. However, the diagnosis of liver cancer can not only rely on the results of ultrasound, but also need to measure alpha-fetoprotein, according to the doctor’s advice to improve the CT scanning and CT enhancement scanning, MRI examination and is liver biopsy. For patients with tumor detected by liver ultrasound, they should go to the hospital in time to improve the relevant examination, so as to clarify the diagnosis of liver tumor and carry out regular treatment as early as possible.