The invention relates to a material and structure testing device and method, and in particular relates to a combinatorial testing accessory of a vibration testing platform and a static fatigue testing method. The combinatorial testing accessory consists of support brackets, a test sample clamp, a vibration transmission device and a bridging bracket. When the accessory is combined, the support bracket is mounted on a vibration testing platform rack, the bridging bracket is mounted on the two support brackets in a spanning manner, the test sample clamp is mounted on the support brackets for clamping a test sample, and the vibration transmission device is mounted on the surface of a vibration testing platform. According to the static fatigue testing method, the combinatorial accessory is mounted on the vibration testing platform and is used for performing 7 types of 13 static fatigue tests on the test sample. The testing device and the testing method expand the function of the vibration testing platform, achieve diversification of load modes, including multiple load modes of pulling, compression, bending, twisting and the like and the combination of the load modes, in the fatigue testing, have a large range of testing frequency, are capable of performing fatigue testing on 5-4500 Hz, and are applicable to high cycle and super high cycle static fatigue testing research on materials and structures.