Clamping device, test tube selecting device and refrigeration storage device

The utility model provides a clamping device, a test tube selecting device and a refrigeration storage device, and the clamping device comprises a base frame; the first driving piece is arranged on the base frame; the multiple clamping jaws are arranged in the circumferential direction of the base frame at intervals, each clamping jaw is movably arranged on the base frame, and the multiple clamping jaws are provided with clamping positions close to one another and separating positions away from one another; the transmission part is arranged between the first driving part and the multiple clamping jaws and located in the base frame, and the first driving part drives the multiple clamping jaws to be switched between the clamping position and the separating position through the transmission part; and the guide structure is arranged between each clamping jaw and the base frame, so that the multiple clamping jaws get close to each other and get away from each other. According to the technical scheme, the problem t