Preparation device and preparation method of biochar-based fertilizer for soil conditioning

The invention discloses a preparation device and a preparation method of a charcoal-based fertilizer for soil conditioning, relates to the technical field of charcoal-based fertilizer preparation, and solves the problem that the charcoal-based fertilizer is dried into blocks and is difficult to crush due to long-time hot air drying. The preparation device comprises a carbonization furnace, the lower end of the carbonization furnace is connected with a stirring box, the carbonization furnace comprises a furnace outer cylinder, a built-in layer is arranged in the furnace outer cylinder, a heating layer is arranged on the outer surface of the built-in layer, and the heating layer is arranged on the outer surface of the built-in layer. And upper discharging openings penetrate through the two sides of the upper ends of the heating layer and the built-in layer, and a supporting net plate is arranged at the bottom end of the inner side of the heating layer. According to the invention, the sealing circular plate move