Abstract: The 3-D fluorescence fingerprint technology has wide application prospects in the correlation of oil sources,the discernment of hydrocarbon properties for traps,the evaluation of traps,etc. In this paper,it was used to analyse oil sources in Dingjiawuxi area,the Dongying Depression. The results show that this area has multisource oil,and the oil sources can be divided into five types,among which type "2" and "2'" are dominant.