M-hydroxybenzaldehyde is mainly used as an intermediate in fine chemicals such as medicine, dyes, fungicides and photographic emulsifiers.Often and organic amine at the same time, play a synergistic effect;In spice synthesis, m-hydroxybenzaldehyde can be used directly as spice or as spice material.Also can be used in food, liquid crystal polymer material field.It is widely used in the synthesis of organic compounds and has important application value.