Portable centrifuge tube rack

The portable centrifuge tube rack comprises a base and an upper cover, when the portable centrifuge tube rack is not used, the upper cover is located at the top of the base, a plurality of supporting columns are placed between the base and the upper cover, limiting protrusions are arranged at the tops of the supporting columns, limiting clamping grooves are formed in the bottoms of the supporting columns, trays are arranged on the side walls of the supporting columns, and the supporting columns are arranged on the upper cover. The trays are in a fan blade shape and are provided with limiting holes with different hole diameters, in the using process, the upper cover is opened, the multiple supporting columns are vertically connected end to end, the limiting protrusions and the limiting clamping grooves of the adjacent supporting columns are matched, the supporting columns can rotate horizontally, the trays are arranged in a staggered mode, and the supporting columns can rotate horizontally. And the limiting cl