Cryopreservation device for mesenchymal stem cells

The utility model discloses a cryopreservation device for mesenchymal stem cells, which comprises a supporting mechanism, a freezing mechanism arranged at the bottom of the inner side of the supporting mechanism, and a buffer mechanism arranged on the inner side of the supporting mechanism and used for supporting a stem cell vessel, the fixing mechanism is arranged on the upper side of the buffering mechanism and used for clamping and limiting the stem cell vessel, and the fixing mechanism and the buffering mechanism are connected with the supporting mechanism. A damping spring of the buffering mechanism exerts upward elastic force on a supporting plate under guiding and limiting of a limiting sleeve, up-down buffering of the stem cell vessel is reduced, and a shifting rod of the fixing mechanism rotates, so that the shifting rod and a limiting rod are driven to rotate under the acting force of the supporting spring on the inner side of a first fixing sleeve and the acting force of the supporting spring on th