NOVELTY - Agricultural soil preparation involves taking organic fertilizer, mineral fertilizer, water conditioning agent, carbon and nitrogen adjustment material and water with beneficial bacteria to obtain multi-ecological fertilizer, where the organic fertilizer is byproduct of crop in agricultural areas (10-40 pts.wt.). The mineral fertilizer (0-8 pts.wt.) comprises powdered rock phosphate and potassium mineral powder. The obtained material is blended with the carbon and nitrogen adjustment material in the ratio of 25-35:1. The water content is adjusted to 50-60% of raw materials.    USE - Method for preparing agricultural soil used for planting (claimed) in agricultural and forestry.    ADVANTAGE - The method enables to produce agricultural soil that has improved quality, efficiency and mass production of plant.    DETAILED DESCRIPTION - Agricultural soil preparation involves taking organic fertilizer, mineral fertilizer, water conditioning agent, carbon and nitrogen adjustment material and water with beneficial bacteria to obtain multi-ecological fertilizer, where the organic fertilizer is byproduct of crop in agricultural areas (10-40 pts.wt.). The mineral fertilizer (0-8 pts.wt.) comprises powdered rock phosphate and potassium mineral powder. The obtained material is blended with the carbon and nitrogen adjustment material in the ratio of 25-35:1. The water content is adjusted to 50-60% of raw materials. Water retention polymer as conditioning agent is added to the obtained material. The effective microorganism is added to the obtained material, and then fermented to obtain the desired product. The effective microorganism is inoculated in liquid containing mushroom spawn mushroom, and then cultivated in the composite type walls-greenhouse canopy structure shed on large-scale fermentation to obtain high-quality ecological main products, namely organic mushroom or organic livestock products and edible byproducts bacterial residue or ecological mattress materials or eco-type organic matrix. Mineral matrix is prepared from loose porous fly ash or slag, weathered coal or coal waste, and then crushed. The obtained material is sieved to obtain mineral matrix. Ordinary field topsoil is disinfected, where the amount of ordinary field topsoil is 0-10 parts by weight of the soil. Vegetables and fruits are cultivated for mass consumption, where the amount of topsoil is taken (10-40 pts.wt.) of the soil. The amount of field planting soil is more than 40 parts by weight. The obtained multi-ecological fertilizer (15-40 pts.wt.), organic matrix (20-50 pts.wt.), mineral matrix (0-40 pts.wt.), and complex agricultural soil, where the mineral substrate, organic matrix and complex agricultural soil are not more than 60 parts by weight, and the amount of the soil is high that is corresponding to the reduction of the mineral substrate.