Clamp for fixing part to be tested onto testing platform

The invention provided a clamp for fixing a part to be tested onto a testing platform. A lap joint part is fixed to the part to be tested. The clamp comprises a base, supporting assemblies and fixing assemblies, wherein the base is fixed to the vibration testing platform, the supporting assemblies are fixed to the two opposite sides of the base and support the part to be tested through the lap joint part, and the fixing assemblies are used for fixing the part to be tested onto the supporting assemblies. When the size of a current transformer exceeds the size of the base, the clamp can still be used. When the size, in one direction, of the current transformer exceeds the size of the vibration testing platform, the clamp and the vibration testing platform can still be used for testing the vibration performance of the current transformer, and troubles and labor are saved.