Abstract: Objective To clarify strontium concentration and isotopic composition characteristics of jujube and its environment of producing area in Ruoqiang,Xinjiang and determine the feasibility of using Sr isotope to trace the geographical origin of Ruoqiang grey jujube.Method Strontium concentration and isotopic composition characteristics were respectively measured by inductively coupled plasma mass spectrometry (ICP -MS) and thermal ionization mass spectrometer (TIMS),which included jujube,soil and irrigation water.Result The sample jujube collected from Ruoqiang Tieganlike Township had higher Sr concentration (5.11 mg/kg) and lower Sr isotope ratios (0.711,329).By contrast,The sample jujube collected from Ruoqiang Washixia township had lower Sr concentration and higher Sr isotope ratios,ranging from 3.14 mg/kg to 4.26 mg/kg(averages 3.78 mg/kg),and from 0.712,643 to 0.713,084 (averages 0.712,897),respectively.Compared with 2.5 mg/kg of Chinese biological standard strontium content,Ruoqiang jujube had higher Sr concentrations (4.67 mg/kg),but the strontium content (2 mg/kg) was relatively low in Xinzheng Henan jujube.Conclusion Based on the strontium content and its isotopic composition,the Ruoqiang grey jujube and Xinzheng grey jujube can be preliminarily distinguished,and the strontium isotope can be used as one of the indexes for tracing the geographical origin of Ruoqiang jujube.