Mercury-free thermometer with protective structure

The utility model relates to the technical field of thermometer protection, and discloses a mercury-free thermometer with a protection structure, which comprises a thermometer fixing sleeve, a supporting mechanism is arranged on the inner side of the bottom of the thermometer fixing sleeve, an adjusting mechanism is arranged on the inner side of the top of the thermometer fixing sleeve, and the adjusting mechanism comprises a lifting assembly and a rotating assembly. The lifting assembly is arranged on the inner wall of the thermometer fixing sleeve, and the rotating assembly is arranged on the top of the lifting assembly. When the annular sleeve ascends and descends, the annular sleeve and the lifting column are fixedly installed so that the lifting column can be driven to ascend and descend, when the lifting column ascends and descends, the lifting column and the fixing block are fixedly installed so that the fixing block can be driven to ascend and descend, and therefore the fixing block and the hinge base