Extraction method and extraction system of tumor cells

The present invention relates to the field of extraction of cells and particularly to an extraction method and an extraction system of tumor cells. The method comprises the following steps that 1, a lifting adjusting knob is rotated to enable a threaded rod to ascend and descend, so that a horizontal distance between a tip end of a needle tube and a supporting base is changed, and a depth of the needle tube penetrating into an affected part is changed; 2, by rotating and adjusting a worm transmission gear, a rotating seat drives moving pins through unfolding arc grooves, so that three unfolding plates rotate by taking fixed shafts rotationally connected with the unfolding plates respectively as shafts, so that distances between the three supporting bases is changed, the device adapts to supporting position areas with different sizes, besides, supporting screw rods are in threaded connection inside threaded tubes, extending lengths of the supporting screw rods can be adjusted respectively so as to adapt to the