Hongsifang water soluble series of fertilizer products is divided according to the criteria into water soluble fertilizer of macro luble fertilizer of medium luble fertilizer of microluble fertilizer containing humic acid, water soluble fertilizer containing amino acid; divided according to the product function root promotion, seedling enhancement, fruit expansion, colorization, soil improvement, and blade surface types. Product quality strictly complies with the relevant standard, and the product is of reasonable formula, stable quality, great variety of goods, persistent action and remarkable effectiveness, and can increase crop yield and improve crop quality. Also, it is non-mless, safe and environment-friendly and easy to use, and is suitable for multiple crops such as melons, fruits and vegetables.