Ground surface settlement observation point protection device

The utility model relates to the technical field of ground surface settlement monitoring, in particular to a ground surface settlement observation point protection device which comprises a room protection barrel, the upper end of the inner side of the protection barrel is fixedly connected with a connecting plate, the upper end of the connecting plate is rotatably connected with a fixing plate, and the outer side of the fixing plate is fixedly connected with a threaded rod. The middle of the outer side of the threaded rod is spirally connected with a sliding block, the left end and the right end of the outer side of the sliding block are rotationally connected with rotating rods, and a fixing block is arranged in a through hole formed in the inner side of the protection barrel. By means of the sliding block capable of moving up and down, the fixing block transversely moves towards the outer side in the through hole formed in the protection barrel, then the fixing block makes contact with the inner wall of the