The invention belongs to the field of chemistry, and particularly relates to a 9-(2-methoxyethyl)-9H-purine-6-amine derivative and application of the derivative in regulating the plant growth and inducing and activating the plant disease resistance. The 9-(2-methoxyethyl)-9H-purine-6-amine derivative is a compound shown in the formula I; the compound has a novel structure and good plant induced disease resistance activity and seed germination promoting activity.