The water defense fluorine ion removal agent developed by our environmental research is effective, easy to operate, and cost-efficient. It can be widely used in various industrial fields such as chemical, power, metallurgy, etc. The fluorine ion removal agent can also be adjusted according to specific water quality requirements to achieve the desired removal effect. During the use of the fluorine removal agent, it is typically added to the water to be treated, stirred, and allowed to react for a period before solid-liquid separation is performed to separate the formed precipitate from the water. This way, fluorides in the water can be removed, resulting in water quality that meets the required standards.