The invention relates to an abdomen ultrasonic image segmentation method. The method comprises the following steps: S1, acquiring an abdomen ultrasonic image sample; S2, performing layered labeling onthe abdomen ultrasonic image sample; S3, constructing a U-NET neural network, and training the U-NET neural network by using the abdomen ultrasonic image sample subjected to layered labeling to obtain an ultrasonic image segmentation network model; and S4, based on the ultrasonic image segmentation network model, directly segmenting the abdominal ultrasonic image, and outputting a layered image of the abdominal ultrasonic image at one time. Compared with the prior art, the scale quantity and range of training samples are increased through data expansion, the step of cutting small images is avoided, meanwhile, computer storage resources are saved, end-to-end learning is conducted through the full convolutional neural network, the segmentation precision of all layers of the abdomen is higher, the segmentation results of all layers in the abdomen ultrasonic image can be output at a time, and the segmentation speed is effectively increased.