Auxiliary device for photographing geological sample

The utility model relates to an auxiliary device for photographing a geological sample, which comprises a body with a plane structure, the plane structure is provided with four boundary lines, and every two of the four boundary lines are perpendicular to each other; wherein scale lines are arranged at the positions of four boundary lines of the plane structure, and when a geological sample is photographed, the geological sample is arranged on the body. The auxiliary device provided by the utility model not only can directly replace a measuring tape measuring tool through the scale marks on the auxiliary device, but also can express a geological sample picture more simply and intuitively, eliminates the troubles of additionally adjusting the chromaticity of a reference object, cutting the length of a measuring tape and the like when the picture is used in the later period, can optimize the geological sample recording process, and improves the geological sample recording efficiency. The geological sample loggin