The invention relates to an intelligent stay-cord fatigue testing machine, comprising a control cabinet (11), an electric motor (8) and a wheel (7). The electric motor (8) and the wheel (7) are fixedly mounted on the control cabinet (11) in a rotatable manner, and the wheel (7) is driven by the electric motor (8). A test desk (2) for holding the product (1) under test is mounted on the control cabinet (11); a guide rail (5) is mounted on the test desk (2), and the guide rail (5) is connected with a cylinder which drives the guide rail to move; a first bracket (3) and a second bracket (4) which can make in-step movements are mounted on the guide rail (5), the first bracket (3) is connected with the second bracket (4) by a connecting rod, and a vertical cylinder which can make upward and downward movements and tension the product under test is mounted on the first bracket (3). The intelligent stay-cord fatigue testing machine has the advantages of high intelligent degree, high safety and reliability, easy operation, brief and clear display, compact structure, easy installation and operation and as well as relatively strong versatility.