The invention discloses an environment-friendly slow-releasing long-standing compound fertilizer which belongs to polyelement compound fertilizer and a production method thereof. The fertilizer comprises the following raw material ingredient (by parts by weight): 10-40 parts of powdered rock phosphate, 10-40 parts of potassium feldspar, 15-40 parts of coal gangue, 10-20 parts of magnesite powder,10-30 parts of nitrogenous fertilizer, 8-18 parts of swell soil, 1-3 parts of kieselguhr and 0.3-1 part of trace element; the powdered rock phosphate, the coal gangue and proper amount of coke are roasted for 8-16 hours at 500-800 DEG C, cooled, crushes and screened by a 60-mesh sieve. The invention provides an environment-friendly energy-saving fertilizer capable of improving soil with comprehensive effective fertilizer composition, slow releasing and high fertilizer utilization ratio. Meanwhile, the environment-friendly slow-releasing long-standing compound fertilizer is suitable for various soils and growth of various crops and the preparation method thereof is provided. The problems of low fertilizer utilization ratio, environment pollution, hardening soil, high production cost and the like in the prior art are solved.