Sulfonylurea herbicide bensulfuron-methyl has a long residue period, which causes residual pollution in farmland soil. In this study, Hansschlegelia Zhihuaiae S113 was used as the material to prepare microbial agents, the preservation conditions of liquid agent were optimized, the best carrier of solid agent was screened and preliminary application of the agent was taken. The results show that: 1) Adding suitable protective agents (0.30% sodium citrate, 0.20% carboxymethyl cellulose, 0.10% CaCl₂) to liquid agent can increase the number of viable bacteria by 37.25%, and the 50 mg/L bensulfuron can be degraded by 94.25% after stored for 30 days. 2) Pig manure fertilizer is screened as the best carrier of solid agent. After 60 days of storage, the viable bacteria number is 7.45×10⁷ cfu/g, bensulfuron-methyl can be degraded by 91.22%. 3) The addition of solid bacterial agent can effectively reduce the bensulfuron-methyl toxicity to the maize.