Concrete surface carbonization depth detection device

The invention discloses a concrete surface carbonization depth detection device, and relates to the technical field of concrete detection, the concrete surface carbonization depth detection device comprises a first detection column, a second detection column and a connection assembly, the surface of the first detection column is provided with a plurality of first marks; the second detection column and the first detection column are arranged in parallel, and a plurality of second marks are arranged on the surface of the second detection column; a third mark is arranged on the surface of the connecting assembly, the first detection column is slidably connected with the connecting assembly and can move in the length direction of the first detection column so as to change the relative position of the first mark and the third mark, and the second detection column is slidably connected with the connecting assembly. The second detection column can move in the length direction of the second detection column to change