The invention discloses a crop degerming agent, which is composed of the following components in parts by weight: 10 to 12 parts of garlic powder, 6 to 8 parts of lithospermum, 20 to 22 parts of cactus extract, 10 to 12 parts of balsam pear, 7 to 9 parts of China rose, 12 to 14 parts of tea tree oil, 5 to 7 parts of pepper, 25 to 35 parts of onion, and 5 to 7 parts of euphorbia fischeriana. The residues of the crop degerming agent on crops are few, and do not harm people even if people eat the residues.