Low-temperature conservation box

The utility model relates to a low-temperature conservation box, particularly to a low-temperature conservation box for a conservation device in the low-temperature state in the field of reproductive medicine, particularly in the liquid nitrogen environment. The low-temperature conservation box comprises n layers of drawers; a lock structure is outwardly arranged on the outer end surface of each layer of drawer; the lock structure comprises a rotatable handle; the handle is connected with a connecting component; and a fixing rod is connected on the connecting component. The low-temperature conservation box provided by the utility model can be widely applied in the low-temperature environment, particularly in the liquid nitrogen environment; the operation is simple and convenient, so that the low-temperature conservation box can control each layer of drawer respectively; the simultaneous operation by many operators is not required; and the low-temperature conservation box can be directly extracted, so that the