Imazethapyr degrading bacterium and application thereof

The invention provides a bacterial strain capable of degrading imazethapyr, which is a bacillus cereus bacterial strain MZ-1, and is preserved in the China General Microbiological Culture Collection Center on January 18, 2021, the preservation number is CGMCC NO.21659, and the preservation address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The invention also provides a screening method of the imazethapyr degrading strain, a bacterial preparation and application thereof, and a method for degrading imazethapyr or repairing imazethapyr pollution. The strain MZ-1 provided by the invention has relatively high degradation performance on imazethapyr, and a degradation product is non-toxic or relatively low in toxicity to a sensitive crop rape, so that the phytotoxicity of imazethapyr to succeeding crops can be reduced, the residual pollution of imazethapyr can be effectively treated, the ecological pressure of imazethapyr to the environment can be reduced, and the ecological environment can be p