CELLPRO biological magnetic rod sleeve with deep well plate is suitable for nucleic acid extraction on the specified model of nucleic acid extraction machine. In the process of nucleic acid extraction equipment, it can protect the magnetic rod from liquid separation and prolong the service life of the magnetic rod. Through the up and down movement of the magnetic rod sleeve, the sample can be evenly mixed, cracked, combined, washed, and eluted in the corresponding magnetic bead reagent.