The invention discloses a production method of a soil conditioning and remediation nutritional agent. A smashing box and a mixing box are included. A first controller is fixedly mounted at the upper end of the right side of the outer surface of the smashing box. A first dust collector switch, a first motor switch and a solenoid valve switch are sequentially and fixedly mounted on the outer surface of the first controller from top to bottom. A first dust collector is fixedly mounted at the right end of the top of the smashing box. A first feeding opening is formed in the middle end of the top of the smashing box. According to the production method, crushing hammers are arranged on the outer surface of a first rotary shaft, smashing teeth are arranged on the outer surface of a second rotary shaft, the first rotary shaft and the second rotary shaft are connected with a first motor through belts, and therefore the dual crushing function on raw materials is achieved, the problem that single-time crushing is achieved by existing production equipment, and consequently, crushing efficiency is low is solved, meanwhile, the manufacturing cost and power consumption cost of equipment are reduced, and the benefits of enterprises are achieved.