Abstract: In order to apply pulse neutron formation elements logging tool, the research on the interpretation method of the formation elements logging was performed. A standard spectrum library of the formation elements was obtained, and an interpretation software was compiled, through which，the element yield, dry weight (mass percent content without crystalline water) and mineralogical-composition could be obtained. Comparing the interpretation results with the data from the cored well showed that the interpretation results had a good consistency with the core test results，which provided data bases for the evaluation of complex lithology and accurate calculation of porosity.