Antibacterial crude extract generated by bacillus M29 with broad-spectrum soil-borne pathogenic bacterium antagonistic function and application of antibacterial crude extract

The invention discloses an antibacterial crude extract generated by bacillus M29 with the broad-spectrum soil-borne pathogenic bacterium antagonistic function and application of the antibacterial crude extract. The bacillus M29 is preserved in China General microbiological culture collection center of China Management Committee for Culture Collection of Microorganisms, the preservation serial number is CGMCC NO.11557, and the preservation date is October 29, 2015. The antibacterial crude extract extracted through an acidic precipitation method after fermentation liquor of the strain is subjected to centrifugal sterilization can still effectively antagonize grey mould, trichoderma, aspergillus fumigatus, fusarium oxysporum, fusarium oxysporum vasinfectum, muskmelon fusarium wilt, strawberry root rot fungi, peach canker bacteria, verticillium dahilae, rhizoctonia solani kuhn and other pathogenic fungi. The antibacterial crude extract has the advantages of being easy to preserve, capable of being massively produced, good in prevention effect, good in environment safety and the like, and has good commercial application prospects.