The invention provides a slow-release compound fertilizer. The slow-release compound fertilizer comprises the following components: 1-4 parts of zeolite powder, 2-10 parts of rice husks, 2-8 parts ofactivated carbon powder, 30-50 parts of a compound fertilizer, 10-20 parts of a coating material, 1-3 parts of a bacteriostatic agent, 1-4 parts of a binder, 1-6 parts of an emulsifier, and 2-5 partsof a water retention agent, wherein the compound fertilizer is composed of the following materials: 8-12 parts of urea, 6-10 parts of ammonium nitrate, 3-6 parts of calcium nitrate, 2-5 parts of calcium phosphate, 6-10 parts of potassium dihydrogen phosphate, and 5-7 parts of dipotassium hydrogen phosphate; the bacteriostatic agent is one of euphorbia hirtapowder and litsea cubeba powder; and a mass ratio of the zeolite powder to the rice husks to the activated carbon powder is 3:7:4. The slow-release compound fertilizer provided by the invention has the advantages of an adjustable nutrient ratio, remarkable effects of slow release and yield increasing, and antibacterial water-retention functions, and can solve the technical problems that a slow-release effect of a compound fertilizer in the prior art is not ideal and a function is single; and the production process of the slow-release compound fertilizer is simple and has better demonstration and promotion effects.