The application discloses a method for collecting active proteins of water leeches, a detection method, an
analysis method and application thereof, and relates to the technical field of biological medicines. The application provides the water leech seedlings treated by hunger and the living host treated by emptying, so that the water leech seedlings adsorb and suck the host, and then the active proteins are injected into the body of the host; the sample of the host after being sucked is collected, and then is made into a freeze-dried
powder after being frozen and dried, so that the active proteins of the water leeches are obtained; the proteins are extracted from the freeze-dried
powder, and then are subjected to enzymolysis treatment to generate
peptide segments; the liquid
chromatography-
mass spectrometry technology is used to detect the
peptide segments; and the
mass spectrometry data are subjected to
database searching analysis based on the
protein sequence database of the water leeches and the host, so that the active proteins from the water leeches are identified and the relative content is determined. The application utilizes the characteristic that the active proteins are injected into the body of the host in the sucking process of the water leeches, and realizes efficient enrichment of the target proteins. In combination with the
proteomics technology, high-
throughput and high-sensitivity
protein identification is realized.