综述了杂交水稻生理、生化研究的现状及其主要进展，重点论述了氨基酸、蛋白质变化、植物激素、能量代谢、酶活性、碳水化合物含量以及同化产物的分配等与不育系育性变化的关系，还从生化观点阐明了杂种优势表现的原因。最后，对借助于现代生物技术利用亚种间杂种优势以及今后研究的问题提出了看法。 The current situation and main progresses of physiology and biochemistry of hybrid rice were summarized, and the relationship between amino acid and protein changes, plant hormones, energy metabolism, enzyme activity, carbohydrate content and assimilation product distribution and fertility changes were also discussed , But also from the biochemical point of view illustrates the reasons for the performance of heterosis. Finally, a view is expressed of the use of modern biotechnology to take advantage of the heterosis between subspecies and future research.