A self-aligning spectrometer carrying platform comprises a carrying platform body, a support, a cone groove, a string, a cone and a datum point. The datum point is arranged on the carrying platform body, the support is inverted-L-shaped, the lower end of the support is fixedly connected with the carrying platform body and is perpendicular to the upper side face of the carrying platform body, the cone groove is fixedly arranged on the left side, a first fixing hole is arranged on the lower side of the right end right facing to the datum point, and a second fixing hole is arranged at the middle position of the upper side face of the cone. The cone is matched with the cone groove in size, and two ends of the string are respectively connected with the first fixing hole and the second fixing hole. When the length of the string meets the height of the carrying platform body, a tip end of the cone is almost next to the datum point. When the self-aligning spectrometer carrying platform is used, the cone freely droops, three screws under the carrying platform body are adjusted till the cone is static and the tip end of the cone is aligned at the datum point, the carrying platform body is approximately horizontal, the cone is lifted to be placed in the cone groove, and other adjustment of a spectrometer can be performed. The self-aligning spectrometer carrying platform has the advantages of being simple, convenient, practical and obvious and safe in experiment effect.