Portable folding test tube rack

The utility model relates to a test tube rack, in particular to a portable folding test tube rack, which comprises a vertical column, a base, a spacer block, test tube sleeves and a supporting sleeve, and is characterized in that the base can be divided into three parts, and the three parts are fixed into a whole through the vertical column, the supporting sleeve is sleeved on the vertical column, the test tube sleeves and the spacer block are sleeved on the vertical column through spacing with each other and are located on the supporting sleeve, and test tube holes are arranged on the test tube sleeves. Since the base of the utility model can be divided into three parts and can rotate around the vertical column, the rack is convenient to place, the test tube sleeve also can rotate around the vertical column, the test tube holes on the test tube sleeves have different standards, the supporting sleeve can prevent the test tube sleeves from sliding down, the space between the test tube sleeves can be freely adj