Separation method and application of algicadal bacteria

The invention relates to an algae-lysing bacteria separation method and the application thereof. The separation method adopts that firstly, the solid separation culture medium of algae-lysing bacteria is configured; secondly, a group of environmental samples containing the algae-lysing bacteria are diluted to one tenth to form concentration gradient, 0.1-0.2ul of each concentration of the samples is respectively taken and coated on the petri dish of the solid culture medium, to culture to form colonies, and then single colony is selected to perform separation and purification to obtain the purified bacterial strain; thirdly, the liquid cultural medium is prepared; fourthly, the purified bacterial strain is inoculated in the liquid cultural medium according to 2 to 30 percent inoculum size to enlarge the culture to obtain the algae-lysing bacteria liquid. The algae-lysing bacteria liquid is applied in the water body polluted by the blue algae to be used for treating the blue algae plankton blooms. The algae-ly