Abstract: A progress on physioecology for yield formation in rice is summarized，including yield components，photosynthetic production and source-sink characteristics．The characteristics of the three aspects and their network relation during the process of yield formation are analyzed Meanwhile，the yield formation in rice is a dynamic process and the ultimate expression of yield traits is depended on the expression，regulation and interaction of numerous genes during the developmental process．The perspective of further research on yield formation in rice is proposed，with the application of the theory and methods of modern developmental genetics and molecular ecology．