Clamping device

The invention provides a clamping device which comprises a main frame body and a plurality of supporting legs; a detector mounting position is arranged on the main frame body and used for fixing and mounting a detector; the plurality of supporting legs are arranged on the main frame body; a sucking disc is arranged on each of the supporting legs and used for being in absorption connection with a to-be-detected object, so that the detector is fixed in a preset position relative to the to-be-detected object. Therefore, when a compartment is subjected to mechanical property test, as for a to-be-detected object made of a non-magnetic material and having a larger size, the mechanical property detector can be fixed in a corresponding position on the to-be-detected object in a manner of absorption connection. The problem in the prior art that when the mechanical properties of a train compartment made of an aluminum alloy material are detected, the detector is hard to be fixed on the compartment is solved. 本发明提供了种夹具装