Explosion-proof device for stem cell cryopreservation tube

The utility model discloses an explosion-proof device for a stem cell cryopreservation tube. The explosion-proof device comprises a placing plate, placing holes, an explosion-proof tube, a bracket and a rotating structure, by arranging the rotating structure, when the placing angle of the cryopreservation tube placed in the anti-explosion tube needs to be adjusted, the placing plate can be rotated anticlockwise, so that the placing hole and the anti-explosion tube are driven to rotate, and the cryopreservation tube placed in the anti-explosion tube rotates and then is in an inclined state; liquid nitrogen in a cryopreservation tube in an inclined state volatilizes more quickly, so that the cryopreservation tube recovery efficiency is improved, a connecting plate is driven to rotate a rotating block when a placing plate rotates, and after the placing plate rotates to a certain angle, a positioning block is inserted into a positioning opening to limit the rotating block, so that the placing plate is limited aft