Fixing structure and ladder stand device

The utility model relates to the technical field of special crawling ladders for entering and exiting a rotor center body of a water-turbine generator set, in particular to a fixing structure and a crawling ladder device, which comprise a fixing unit, the fixing unit comprises a left-right moving part and an upper-lower fixing part, the left-right moving part is arranged on one side of the upper-lower fixing part, and the left-right moving part is arranged on the other side of the upper-lower fixing part. The left-right movable part comprises a connector, a movable connector, a connecting rod and a first screw, the up-down fixed part comprises a limiting block, a connecting block, a movable groove, a second screw and a supporting leg, and the crawling ladder unit comprises a ladder body, a fixed pressing rod, a handrail, a pedal and a moving platform. The fixing structure has the advantages that extra supporting and stability can be provided, the fixing structure is particularly used in a high working environ