Abstract: 100 000 m3 Storage Tank is a new kind of large tanks designed by our country, due to the new process in structural installation, and fast construction speed, it brought a lot of pressure to nondestructive testing. In order to ensure the progress, four machine joint frame was designed by various research, the frame was simple structure, low cost, and had extremely strong practicability. Through practical applications, the testing efficiency was greatly improved extremely, the radiography quality fully met with interrelated standard.