Germplasm resource is very important to the modern breeding and the study of biotechnology.The research on the genetic relationships of germplasm resource can provide scientific basis for exploring the origin, evolution, classification and for tea breeding and application of tea germplasm resource. A brief review is presented in this article on the study of the genetic relationships of tea germplasms in the morphlogical characters,chemical characters and chromosomal structure,isozyme and DNA. And the way in which to study the genetic relationships of tea germplasm resource in the future is discussed.