Microbial agent capable of improving stability of beauveria bassiana and preparation method thereof

The invention belongs to the technical field of microbial pesticides and agricultural fertilizers, and particularly relates to a microbial agent capable of improving the stability of beauveria bassiana and a preparation method of the microbial agent. Comprising the following raw materials in parts by weight: 5-15 parts of beauveria bassiana spore powder, 45-55 parts of brewer's grains, 20-25 parts of a carrier, 5-10 parts of solvent oil, 9-10 parts of dextrin, 0.5-1 part of nano titanium oxide, 5-8 parts of an activator and 0.2-0.5 part of sodium carboxymethyl starch. According to the ecological microbial agent composed of beauveria bassiana spore powder, solvent oil, a carrier, an anti-ultraviolet agent, a dispersing agent and an activating agent, the stress resistance of effective components of the ecological microbial agent is enhanced, and plants can be promoted to grow remarkably. The beet powder is used as a carrier, the soybean oil is used as auxiliary oil, and the trehalose and the tyrosine are used a