The GB/T 328.20-2007 standard is for the determination of the disbonding performance of asphalt waterproof membrane joints. It specifies the test equipment in detail, such as the instruments and accuracy indicators that can provide stable disbonding force. During the preparation of the sample, the production method and size specifications of the butt joint are clarified. During the test, the disbonding speed, test environmental conditions and other operation details are strictly regulated, and the result evaluation method of the joint disbonding performance is given. With this standard, the disbonding resistance of asphalt waterproof membrane joints can be accurately evaluated, providing a key basis for the mass control of waterproof membrane and engineering applications. It is widely used in the field of waterproof membrane production and building waterproof construction.