The invention discloses saline-alkaline resistant Bacillus pacificus, and a biogen and application thereof. Bacillus pacificus YJJK-16 isolated from rhizosphere soil of chinese cabbages in saline andalkaline land is preserved in a general microbial center of China committee for culture collection of microorganisms on July 26, 2009, and the preservation number is CGMCC No.18300. Propyl gallate, biochemical fulvic acid powder and kathon are added into fermentation liquid of bacterial strains and stirred evenly to obtain the biogen. The Bacillus pacificus YJJK-16 has high saline-alkaline resistance, the colonization rate in saline alkali soil is high, the antagonistic effect is high on chinese cabbage soft rot pathogenic bacteria, the Bacillus pacificus YJJK-16 can be used for production ofmicrobial fertilizer, especially microbial fertilizer special for the chinese cabbages in the saline and alkaline land, is used for biological control of chinese cabbage soft rot, occurrence of diseases is reduced, and the yield and the quality are improved.