Microgel is a kind of gel composed of high molecular substances,and its size is usually in the nanometer to micron level.Microgel has three-dimensional network structure,can form reversible gel state in solution,and has high specific surface area and porous properties.The special properties and adjustability of microgel make it have extensive application potential in cosmetics and washing industry,drug delivery,tissue engineering,sensors,separation technology and other fields.With the deepening of scientific research and the continuous progress of technology,the application of microgel will further develop.