本文根据作者大量实地考察，并参考前人的有关研究资料，对西藏地区鱼类组成、分布及渔业区划等进行了深入研究和分析。提出：现知我国西藏地区共有鱼类３目，５科和４亚科，２２属，以及６３个种和８个亚种；裂腹鱼类、高原鳅类和　类这三大类群占了整个西藏鱼类的９３．４％以上；结合鱼类分布特点及与渔业生产有关的区域自然地理特征，进行了渔业区划，划分出３个１级区和５个亚区。

The Tibet Plateau is the main part of the Qinghai-Tibet Plateau.It is the highest plateau in the world and usually called"the Third Pole" because its average altitude is over 4000m.Numerous renowned rivers in Asia or in the world,such as the Changyiang,Lancangjiang,Nujiang,Irrawaddy,Yarlongzangbo,Indus Rivers,ect.,and interior waters, such as the Nam Co,Silling Co,Banggong Co,Yamzhonyum Co,Maphamyum Co Lakes,ect.,rise or flow here.They constitute a very complex water system.The special topography and harsh climate on the plateau make the ichthyofauna existing here show obvious regionality and unique.According to the composition and distribution of the fishes and the features of the regional natural geography relating to the fishery production in Tibet,three first-class fishery regions and five fishery subregions are divided.They are:(a).The Northern Tibet Region.It can be divided into three subregions:the Ngari Subregion,The Nagqu Subregion and the Qiangtang Subregion:(b).The Upper and Middle Yarlongzangbo River Region and(c).The Southeastern Tibet Region.It includes two subregions:the Lower Yarlongzangbo River Subregion and the Sanjiang Gorge Subregion of Eastern Tibet.