The invention discloses a chitosan and sulfur coated special sustained-release fertilizer for wheat and a preparation method thereof, which belong to the technical field of controlled-release fertilizer. The fertilizer is based on the nutrient absorption law of wheat. The fertilizer is obtained by preparing 5-percent chitosan coated urea, 6-percent chitosan coated urine, sulfur coated urine, monoammonium phosphate, potassium chloride, humic acid and ethylene diamine tetraacetic acid (EDTA) chelate iron according to a specified mixing ratio, fully mixing, weighing and packaging. The special controlled-release fertilizer has the advantages of high nutrient utilization rate, environment pollution reduction due to degradability of the coating of the fertilizer, low price, consistence between nutrient release and wheat absorption law, labor cost conservation and improvement on quality of wheat.