The invention provides a garbage compound fertilizer. The garbage compound fertilizer is prepared by the steps that livestock excrements, household garbage, leaves and crop straws are mixed proportionally and are added with an appropriate amount of water to be uniformly stirred; then, the obtained mixed raw materials are added with a compound bacterium agent to be fermented, wherein the fermenting temperature is 25-30 DEG C, and the time for fermenting is 6 days; and finally, a nitrogenous fertilizer, a phosphatic fertilizer and a potash fertilizer are added into the product proportionally to be mixed uniformly and then be granulated and screened, so that the preparation of the garbage compound fertilizer is completed. The garbage compound fertilizer takes solid wastes as the raw materials, so that pollution is reduced, and the solid wastes can be utilized again. Under the condition of the equal crop yield, with the garbage compound fertilizer, the fertilizer cost is lowered, and thus, great economic benefit is brought.