Due to the improvement of the requirements of construction engineering quality,the importance of construction engineering concrete detection is gradually enhanced.Ultrasonic wave is an important part of geophysical exploration technology.It has the important advantages of high detection efficiency and accurate detection results in the application of construction concrete detection.In this paper,the basic principles and characteristics of ultrasonic detection technology are briefly described,combined with common ultrasonic technology and its application principle in concrete detection,the specific application of ultrasonic technology in building concrete detection is analyzed.