The invention discloses a special matrix for capsicum seedling culture and belongs to the technical field of soilless culture. The matrix comprises an organic mixture, which is prepared through fermenting vinegar residues and cassava residues, vermiculite, peat, plant ash, pearlite and a small amount of inorganic fertilizer, such as ammonium sulfate nitrate, potassium chloride, monoammonium phosphate and the like. The matrix contains the ingredients, namely the organic mixture, the peat, the pearlite, the vermiculite and the plant ash, in the volume ratio of (8-10): (1-2): (1-2): (2-3): (3-4); the matrix for seedling culture further contains the ingredients in concentration: 0-0.6kg/m<3> of ammonium sulfate nitrate, 0-0.3kg/m<3> of potassium chloride and 0-0.2kg/m<3> of monoammonium phosphate. According to the matrix, organic wastes, such as the vinegar residues and the cassava residues, are mainly taken as raw materials and are subjected to high-temperature decomposed fermentation, so as to prepare the seedling culture matrix for soilless culture, so that the waste is changed into the valuable, and harmful substances are changed into favorable substances; the cost is low, the weight is light, and nutrients are complete, so that the matrix is a good special matrix for the seedling culture of capsicum soilless culture.