Fecha de publicación: 24/12/2021 Fuente: Wipo "olive oil" The invention provides a trichoderma harzianum compound bacterial fertilizer and a preparation method and application thereof. Bacillus subtilis, trichoderma harzianum and bacillus amyloliquefaciens are compounded to serve as a fermentation strain, and then the fermentation strain is combined with acesulfame potassium, oyster powder, medical stone, zeolite, olive oil, sodium benzoate and sodium allysulfonate, so that the acting effect of the trichoderma harzianum compound bacterial fertilizer can be improved, the use amount of the bacterial fertilizer is reduced, and the planting cost is reduced; and the trichoderma harzianum compound bacterial fertilizer disclosed by the invention can increase the yield of crops and enhance the stress resistance and immunity of the crops, also has the effect of promoting plant growth, and can be applied in different growth periods of the crops, so that the use of chemical fertilizers can be reduced.