Biological bacterial fertilizer and preparation method and application thereof

The invention is suitable for the fields of microbial fermentation and fruit tree cultivation, and provides a biological bacterial fertilizer, and a preparation method and an application thereof. Thepreparation method of the biological bacterial fertilizer comprises the following steps: crushing forestry and agricultural residues, mixing the crushed forestry and agricultural residues with extremethermophilic bacteria, and rapidly dissociating the crushed materials under the combined action of high temperature and the extreme thermophilic bacteria, and obtaining the fermentation raw materialssuitable for efficient fermentation of other beneficial bacteria; cooling the fermentation raw material treated by the extreme thermophilic bacteria, and then adding probiotics for fermentation treatment to obtain a fermentation product; and supplementing probiotics into a fermentation product through quality detection, and then performing granulation treatment to obtain the biological bacterialfertilizer. The unique extre