The invention relates to a matched test tube strip of an immunomagnetic beads purification instrument. The matched test tube strip is characterized by comprising a test tube strip in a long strip holeshape, wherein a plurality of accommodating chambers are designed on the test tube strip, the opening of each accommodating chamber is located in the upper surface of the test tube strip, and each accommodating chamber comprises a sample tube, a cleaning tube, a magnetic bead tube, and a collecting tube. The magnetic bead tubes and the collecting tubes can be taken down from the test tube strip by a bayonet design to facilitate subsequent recovery and result detection of immunomagnetic beads. A connecting piece and a positioning piece are arranged on the test tube to achieve strengthening andpositioning effects. The test tube strip is matched with the full-automatic immunomagnetic bead purification instrument, thus fully utilizing the automatic operation of the purification instrument, improving the experiment efficiency, and reducing the probability of reagent contamination. The test tube is strip mainly used for a pretreatment process of pollution detection samples such as harmfuladditives, harmful and toxic elements, and fungaltoxin in the food safety field, and achieves the effects of purification, enrichment and analysis.