Negative oxygen ion generating device

The invention discloses a negative oxygen ion generation device which comprises a liquid supply assembly, a gas supply assembly, a negative oxygen ion nozzle and a gas-liquid separator, and the liquid supply assembly is provided with a liquid output port; the gas supply assembly is provided with a gas output port; the negative oxygen ion sprayer comprises a sprayer body and a spraying pipe assembly, the sprayer body is provided with a spraying end, a liquid inlet channel and a gas inlet channel, an inlet of the liquid inlet channel is communicated with the liquid output port, an inlet of the gas channel is communicated with the gas output port, and the liquid inlet channel and the gas inlet channel are communicated at the spraying end; the spraying pipe assembly is installed at the spraying end and provided with a mixing cavity and a spraying opening, the mixing cavity is communicated with the spraying end, the spraying opening is formed in one end of the spraying pipe assembly, and a collision structure is a