High-efficiency capillary electrophoresis is a new type of liquid phase analysis technology with capillary as separation channel and high-voltage DC electric field as driving force. It is another major progress after analytical science relay high performance liquid chromatography, which makes the analysis science from microliter. Levels enter the nanoliter level, and single-cell and even single-molecule analysis becomes possible, which has led to new ideas for the separation and analysis of long-term biomacromolecules such as proteins. The instrument can be used for the analysis of organic compounds, inorganic ions, neutral molecules, chiral compounds, proteins and peptides, DNA and nucleic acid fragments. Widely used in environmental protection, biochemistry, medical and health, clinical testing, justice, food hygiene, drug testing, agricultural chemistry and other fields.