Abstract: In accordance with the requirement of the Chinese chestnut (Castaneamollissima) for fertilizer,the additive for inorganic and organic fertilizer,mediumquantity elements and trace elements were added into the basic fertilizer with N,P,K as the key elements,based on the application technique of balanced and appropriate proportion of different elements.Themulti element fertilizer special for Chinese chestnut was developed.The contents of N,P,K,organicmatter and humid acid accounted for above 40%.The yield of the chestnut with the application of developed fertilizer increased by 77.8% compared with that without application.The contents of amino acid,protein,fat,total sugar amount and other nutritional gradients in the fruit augmented sharply.In addition it can also improving resistance,reducing premature drop of the fruits,raising yield and quality, promoting soil improvement.