The invention relates to bacillus subtilis with a stronger phosphorus decomposing effect and stronger gamma-polyglutamic acid producing capacity. Furthermore, the bacillus subtilis has a better preventing and treating effect on varieties of plant diseases and a plant growth promoting effect. A preservation serial number of the bacillus subtilis JCD-H-16 with phosphorus decomposing, disease preventing and growth promoting effects disclosed by the invention is CGMCC NO.13663, a preservation date is February 16th in 2017, and the bacillus subtilis has multiple effects of decomposing phosphorus, preventing diseases, promoting growth, high producing gamma-polyglutamic acid, increasing yield, improving quality, having a wide antibacterial spectrum and the like. A bacterial strain and a fungicideof the bacillus subtilis disclosed by the invention can effectively prevent and treat powdery mildew, bacterial wilt, gray mold, rice sheath blight disease, pimento anthracnose, damping off and the like; broad-spectrum antibacterial is achieved, and effects are stable and durable; the bacillus subtilis can be applied to developing a bacterial fertilizer and a microbial pesticide preparation integrated with phosphorus decomposing, gamma-polyglutamic acid producing and disease preventing and treating. When the bacterial fertilizer of the bacillus subtilis disclosed by the invention is applied,about one half of a nitrogen fertilizer and a phosphorus fertilizer can be reduced, and an obvious yield increasing effect is further obtained.