Provided is a support rod device for a measuring instrument at the highly-suspended position. The support rod device comprises a support rod. The front section of the support rod is a threaded section in sleeve joint with a nut and a backing plate. The support rod at the back end of the threaded section is fixed with a limiting plate. The back end of the support rod is fixedly equipped with a support plate for placing the measuring instrument. The lower part, close to the side of the support plate, of the support rod is fixedly equipped with an ear plate in hinge joint with an oblique rod. The support rod device for the measuring instrument at the highly-suspended position has following beneficial effects: a tripod and the measuring instrument can be directly erected on a swaying suspension platform; and the support rod device has a simple structure and is convenient to operate and safe to use; rigidity and stability are enhanced because of the limiting plate designed to have two symmetrical distributed angle iron.