With computer users increasing in the era of information technology,the original computer equipment＇s beard load flow in processing data resource is more and more big,which requires computer system with higher levels of data processing ability.The extensible markup language is the inevitable trend of the automation of computer data processing,using more high-end digital language perform database control command,to maintain the optimal allocation of resources utilization data regulation.This paper analyses the feature and function of extensible markup language,common key technologies of extensible markup language index and query,develops a set of advanced data markers and defined scheme.