Abstract: Galactomannan gum is a kind of neutral polysaccharides.The polysaccharide gum is pseudo-plastic in aqueous solution, and belongs to entanglement network type in nature.Therefore, it is widely used in many industries as thickener, stabilizer, emulsifier, adhesive and conditioner.The recent researches and applications about galactomannan gum were introduced in the respects of its structure and properties, production process, chemical modification and enzymatic modification.