Method for preparing charcoal-based compound fertilizer from agriculture and forestry breeding wastes

The invention relates to a method for preparing a charcoal-based compound fertilizer from agriculture and forestry breeding wastes. The method for preparing the biochar-based compound fertilizer from the agriculture and forestry breeding waste comprises the following steps that quantitative agriculture and forestry breeding waste is used as a raw material to be mixed and collected, and the agriculture and forestry breeding waste comprises plant source waste and animal source waste; crushing and filtering the mixed and collected agricultural and forestry breeding waste raw materials to remove impurities and overlarge particles; adding the treated raw materials into a carbonization furnace for carbonization treatment at the temperature of 500-800 DEG C; the biological carbon is activated, so that the porosity and the specific surface area of the biological carbon are increased; adding nitrogen, phosphorus, potassium and trace elements in proportion, and adjusting the pH value to generate a charcoal-based compou