In a concrete multi-factor durability experimental device under the action of the bend-pulling stress and the environment coupling, lower part of the pulling rod (6) is connected to a lower pressing board (9); the upper part of the pulling rod (6) presses a stress sensor (1) on the pulling board (2) via the screw cap (3) traversing the upper pressing board (5) and pulling board (2); a spring (4) is arranged between the pulling board (2) and the upper pressing board (5); concrete test pieces (8) are arranged between the upper pressing board (5) and the lower pressing board (9); a mat stick (7) is arranged between the concrete test pieces and between the concrete test piece (8) and the upper pressing board (5) or the lower pressing board (9); two sides of the concrete test piece (8) are arranged with a constant force holding meter (10); the constant force holding meter (10) is connected to the non-metal supersonic testing meter (11). The device is suitable for the big size concrete test piece, retaining the no stress loosing state in the process of loading in a long term.