The rectal examination method is used earlier, and the application has become popular.The rectal examination method is passed on to the students from generation to generation through the accumulation of the teacher's experience and abstract description. Therefore, the rectal examination method is greatly influenced by the touch and experience of the teacher.The veterinary B ultrasound scanner can clearly observe the object of detection through the display screen. Therefore, the B-ultrasound technology is relatively more accurate in determining the symptoms and the measures taken are more effective.The rectal examination method is simple in operation and low in cost. Although the current portable B-ultrasound operation is also simple, the cost is relatively high.