The invention discloses a mulberry tree fertilizer and belongs to the technical field of fertilizers. The mulberry tree fertilizer consists of the following components in parts by weight through fermentation: 15-30 parts of fermented livestock excrement, 20-30 parts of human excrement, 10-15 parts of sugarcane tops, 4-7 parts of living wastewater, 0.5-4 parts of broccoli roots, 3-7 parts of maizeleaves, 1-4 parts of broccoli leaves, 1-4 parts of peanut shells, 1-3 parts of bagasse, 0.3-3 parts of straw ash, 0.2-2 parts of distillers' grains, 0.3-3 parts of tea seed cakes, 0.5-1.5 parts of a deodorant and 0.5-3 parts of lime waster. Wastes such as organic animal and plant residues and human excrement are fermented to prepare the fertilizer, and the obtained fertilizer is capable of improving physical and chemical properties of soil, and improving soil air permeability and loosening the soil as well.