2-Fluorobenzaldehyde is an important intermediate in organic synthesis. It is widely used in medicine, dyes, pesticides and so on. In medicine, it can be used for the synthesis of a variety of drugs, such as antihypertensive drugs, antipyretic, analgesic and anti-inflammatory drugs, anticancer drugs, muscle relaxants and so on. In the synthesis of dyes, the new dyes synthesized from them have excellent properties such as bright luster, light resistance, water resistance and organic solvents; In pesticide production, compared with traditional pesticides, the pesticides synthesized from them have the characteristics of high biological activity, long-lasting efficacy and less side effects.