Needle blocking detection device and full-automatic enzyme-linked immunosorbent assay analyzer

The utility model discloses a needle blocking detection device and a full-automatic enzyme-linked immunosorbent assay analyzer. The device comprises a shell, a needle body mechanism and a switched capacitor, the shell is divided into functional areas, so that the shell is composed of the needle blocking detection structure and the washing liquid tank structure, needle blocking detection of the needle body mechanism can be completed in the needle blocking detection structure, and the cleaning step can be carried out in the washing liquid tank structure. When needle blocking detection is carried out, based on the capacitive coupling technology, the capacitance value corresponding to the liquid amount in the needle body mechanism is sensed through the switched capacitor, the capacitance value is analyzed and processed through the controller, and therefore whether the current liquid amount in the needle body mechanism is reasonable or not is judged, and when the judgment result is unreasonable, it is indicated th