Tea residue worm excretion matrix suitable for tomato seedling growth, and preparation method thereof

The invention discloses a tea residue worm excretion matrix suitable for tomato seedling growth, and a preparation method thereof. The tea residue worm excretion matrix comprises, by volume, 20-40% of tea residue worm excretion, 10-30% of perlite, 10-30% of vermiculite and 20-40% of peat; and the tea residue worm excretion is worm excretion produced by earthworms cultured by an earthworm culturing matrix comprising tea residues and cow dung. The tea residue worm excretion matrix breaks traditional single earthworm pure cow dung culturing modes, realizes cow dung and tea residue reasonably-compounded earthworm compost, and improves the content of nutrients in worm excretion. The worm excretion is used as the tomato seedling growth matrix, so the importance of peat in traditional soilless culture technologies is greatly weakened. The compounding mod of the tomato seedling growth matrix is further optimized, the quality of tomato seedlings is improved, the economic benefit is increased, and the reuse approach of the tea residues is developed. A new method using the tea residues to breed earthworms is developed, and earthworm culture and worm excretion production approaches are increased.