The utility model discloses a universal clamping mechanism for a solar cell temperature control test. Workbench, a plurality of evenly-distributed supporting legs are fixedly installed on the bottom face of the workbench. An annular groove with a T-shaped section is formed in the top surface of the workbench; two sliding blocks with T-shaped sections are arranged in the annular groove; the slidingblock can move along the annular groove; telescopic rods are fixedly mounted on the outer sides of the top surfaces of the sliding blocks; screws are installed on the inner sides of the top faces ofthe sliding blocks through bearings, nuts in threaded fit are arranged at the upper ends of the screws, the outer sides of the nuts are fixedly connected with the inner sides of the movable ends of the corresponding telescopic rods, probes are fixedly installed on the inner sides of the nuts, a containing groove with the stepped section is formed in the middle of the top face of the workbench, andthe inner bottom face of the containing groove communicates with the workbench. The battery testing fixture is reasonable in structural design, convenient to take out and install a to-be-tested battery, capable of improving testing efficiency, capable of adapting to testing of battery pieces of various specifications due to the step-shaped placing groove, wide in application range, capable of adjusting the distance between the probes so as to be matched with contacts of different to-be-tested battery assemblies for detection, and convenient to operate.