The full name of rice seedling-strengthening agent is rice seedling-strengthening nutrient, which is a multifunctional solid powdery acid compound fertilizer. It contains not only sulfuric acid, humic acid and complete fertilizer, but also bactericide, chlormequat chloride and rooting agent. One application can achieve the integration of acid adjustment, disinfection, nutrition and chemical control, simplify management and save labor and cost. The packaging of its finished products is mostly 2.5 kg per bag, and each bag can be used for 18 m 2 seedbeds.