Abstract: The fest conditions,construction of the gasification stove,test systems,fundamental principles and test results of the industrialization test on the Underground Coal Gasification of the Tangshan Liuzhuang coal mine are presented in this paper.Survey Radon technology is used to probe the moving velocity and length of the gasification surface, and test data are analysed.The success of the industrialization test indicates that Underground Coal Gasification has made big progress commercial application in china,and it further proves the reasonableness and feasibility of the new technology of long tunnel,large section,and two stages.It is concluded that this technology could be widely used in the aged scrap pit in china.