A natural multi-function mineral complex fertilizer is characterized in that the fertilizer is made from the raw materials with the following weight percentages: 28-33% of urea, 15-25% of monoammonium, 12-17% of potassium fertilizer, 30-45% of attapulgite powder and 5-10% of humic acid by the preparation method of the conventional fertilizer. The attapulgite powder is a nano-grade porous nonmetallic mineral substance with physical properties of strong adsorbability, cation exchange property, large specific surface area, and the like, wherein, the water absorption rate is equal to or more than 60%, the cation exchange capacity is equal to or more than 20mmol/100g, and the specific surface area is equal to or more than 120m<2>/g; meanwhile, the attapulgite powder is rich in various nutrient elements of potassium, phosphor, calcium, magnesium, sulfur, iron, copper, zinc, molybdenum, manganese, boron, iodine, selenium, and the like; the humic acid can inhibit the activities of urase, and slow down the decomposition of the urea, and the complex compound produced can gradually decompose and release nitrogen, thus prolonging the fertilizer efficiency. The natural multi-function mineral complex fertilizer has the advantages of being applicable to all crops, and realizes the aims of reducing the fertilizer consumption, enhancing the utilization ratio of the chemical fertilizer, reducing agricultural production cost, increasing the yield and quality of farm products, and improving the soil.