Brief introduction: Microfluidic chip technology integrates the basic operating units of biological, chemical and medical analysis process, such as sample preparation, reaction, separation and detection, on a micron scale chip, and completes the whole process of analysis automatically. Due to its great potential in the fields of biology, chemistry, medicine and so on, it has developed into a new and interdisciplinary research field of biology, chemistry, medicine, fluid, electronics, materials and machinery. Classification: Microfluidic chips include: platinum resistance chip, pressure sensor chip, electrochemical sensor chip, microfluidic reactor chip, microfluidic fuel cell chip, microfluidic filter chip, etc. Features: Microfluidic chip has the characteristics of controllable liquid flow, few sample consumption and reagent, and the analysis speed is increased by 100 times. It can conduct simultaneous analysis of hundreds of samples in a few minutes or less, and the whole process of sample pretreatment and analysis can be realized online.