It was conducted with spraying the canopy in the solution of KH2PO4(PK),CaCl2(Ca),KH2PO4 CaCl2((PK Ca) with 0.2% concentration to study the effects on the the pigmentation in peel of Sanyuehong litchi fruits.The experiment showed the following facts.During the period of the growth and development of fruits,the curve of the changes in the total of sugar shaped "w".The main tendencies of the contents of the chlorophyll and the acid in peel were down.The curves of the changes in the carotenoidin in peel were shaped the Chinese word zhi.The main tendencies of the changes in the anthocyaindin in peel were up.The different treatments did not influence the content of the carotenoidin in peel,and yet remarkably influenced the changes in the contents of the anthocyaindin and chlorophyll and the total of the soluble sugar and acid in peel.The pigmentation was due to the decrease of the contents of photosynthetic pigments and the increase of that of anthocyaindin in peel.The treatments did good to the pigmentation of fruitst.