Bacillus subtilis is an active substance capable of producing a variety of antimicrobials, enzymes and promoting the growth of plants and animals, which is widely used in modern agricultural production due to its clear research background, wide range of application scenarios, rich industrial use time, non-toxicity and harmlessness to human beings, and its ability to produce spores to tolerate adverse environments. If Bacillus subtilis is further mutated, it can enhance the production of antimicrobials and enzymes, and improve the economic benefits and work efficiency, UV mutagenesis as a safer and widely used mutation technique has been chosen by many scientists, this paper summarizes the current status of Bacillus subtilis after UV mutagenesis in various applications in recent years, and elucidates the future application prospects and research hotspots of Bacillus subtilis in the field of agriculture. The paper summarizes the current status of the application of Bacillus subtilis after UV mutagenesis in various aspects in recent years, and elucidates the future prospects of Bacillus subtilis in the field of agriculture and research hotspots.