With the increasing improvement of cassiterite UPb dating method, using cassiterite insite UPb dating for tin polymetallic deposits has been of relatively mature technical conditions and will be one of the most direct and effective approach in study of the metallogenic time of tin deposits. Based on our lab research in the past several years, this study summarized the progress of LA(MC)ICPMS cassiterite UPb dating method and the advantages and disadvantages of LAMCICPMS and LAICPMS. In addition, the application results of this method in superlarge tin deposits in Furong, Gejiu and Dachang are described. This study also presents the existing problems and technical difficulties of the method, which are common lead correction and ideal sample production, only through which can the precision and accuracy of dating results be improved. Meanwhile we further optimized insitu cassiterite UPb dating technique, which can not only obtain accurate metallogenic chronology information but also provide technical support for understanding the formation and evolution of relevant deposits.