Outer protection structure for outdoor earth height measuring instrument

The utility model discloses an external protection structure for an outdoor earth height measuring instrument, which comprises a shell, a shell cover, a bottom plate, an appliance bin, an elastic ring I, an elastic ring II and a support plate, the shell cover is arranged above the shell, a fixed disc is arranged at the bottom of the shell cover, a sealing ring is arranged on the bottom surface of the shell cover, the bottom plate is arranged at the bottom of the shell, and the appliance bin is arranged on the bottom plate. Supporting frames are arranged on the two sides of the bottom of the bottom plate. The accommodating size of the first elastic ring can be adjusted through the first extension rod, the accommodating size of the second elastic ring can be adjusted through the second extension rod, the first elastic ring and the second elastic ring are used in cooperation, geodetic height measuring instruments of different models and sizes can be protected, falling impact force is buffered through the damping