Abstract: APPLICATONS OF RADIATION TECHNOLOGY IN SYNTHESIS AND MODIFICATION OF THERMALLY REVERSIBLE HYDRO6GLSZhai Maolin；Yi Min；Ha Hongfei（Department of Technical Physics,Peking University,100871）ABSTRACT Study on thermally reversible hydrogels is a potential field which has been developed in recentdecade，Their characteristics，research status and applications in the chemistry engineering，biomedicaland bioengineering are reviewed． Especially，the applications of radiation technology in synthesis andmodification of thermally reversible hydrogels are discussed in details. Key words ionizing radiation technology thermally reversible hydrogels immobilizationdrug delivery systems（DDS）