Negative-pressure hydro-optical needle

The utility model discloses a negative-pressure water-light needle. Comprising an upper needle frame, a lower needle frame connected to the upper needle frame, a mounting plate connected to the upper needle frame and located between the upper needle frame and the lower needle frame, a plurality of needle head mounting columns arranged on the mounting plate and needle holes formed in the needle head mounting columns. The injection needle is arranged in the needle hole and located in the lower needle frame; and the negative pressure connector pipe is connected to the lower needle frame. The annular hollow sealing ring is matched with the annular edge of the lower needle frame, sealing between the annular edge and the skin can be well achieved, and the using comfort level of the negative pressure hydro-optical needle can be improved through contact between the annular hollow sealing ring and the skin. The structure that the lower needle frame and the upper needle frame are connected through the springs is arrang