A study on functional compositions of rice, which including 111 improved varieties of Yunnan province and 77 Yuanyang local varieties. Using Cheng's index to distinguish indica-japonica rice, spectrophotometry determination content of functional compositions (including resistant starch of polished rice; g-aminobutyric acid and flavones of unpolished rice), at last using SPSS software analysis the data．The main results are as follows:（1）All samples' content of RS is Indica＞Indica-like＞Japonica-like＞Japonica，but content of GABA is opposite，the relationship between Flavones and Indica-Japonica type is inconspicuous；（2）Content of RS and Flavones is colored＞colorless，but content of GABA is colorless＞colored． In a word，as to the functional content，colored＞colorless、Indica＞Japonica、unpolished＞polished、local＞improved．The colored、Indica、unpolished、improved type is best．It recovers the relationship between Indica-Japonica type、colored-colorless、local or improved、polished or unpolished ice and functional compositions．