The invention discloses a stress eliminating device and method for an assembly of a carbon fiber wire clamp. The stress eliminating device includes a vibrating platform, a vibrator and a vibrating sensor. The vibrator is arranged on the platform surface of one end of the vibrating platform. The vibrating sensor is arranged on the platform surface of the opposite other end of the vibrating platform. At least one set of clamping structures are arranged on the vibrating platform. Each set of clamping structures comprises two clamping strips. A plurality of trapezoidal slots arranged at intervalsare formed in each clamping strip. The trapezoidal slots of the two clamping strips on the same clamping structure are formed correspondingly. A plurality of threaded holes are formed in the vibratingplatform between the two clamping strips and are provided with bolts. Each bolt is provided with a pressing plate in a penetrated mode. The upper portion of each pressing plate is provided with a nut. According to the stress eliminating device for the assembly of the carbon fiber wire clamp, stress in the assembly of the carbon fiber wire clamp can be quickly and effectively eliminated.