Soilless culture organic matrix used for tomato seedling raising and preparation method thereof

The invention discloses a soilless culture organic matrix and preparation method thereof; wherein the soilless culture organic matrix is formed by evenly mixing corn cob fragments, corn stalk fragments and mushroom residue after respective piling fermentation according to volume ratio of (1.5-2.5): (4-6): (1.5-4.5). The main raw materials of the soilless culture organic matrix provided by the invention adopts waste corn stalk, corn cob and mushroom residue in local agricultural production instead of matrix raw material grass carbon commonly used in the current seedling raising, thus not only greatly saving seedling raising cost but also reducing over-exploitation of non-renewable resources grass carbon, thereby maintaining ecological sustainable development; not only environmental pollution caused by burning is avoided, but also sustainable utilization of resources is realized.