In order to identify the geographical origin of Eriocheir sinensis under the co-cropping mode of Northern Rice crab， the 16 elements of V， Cr， Mn and other 16 elements in 36 samples of Eriocheir sinensis in Heilongjiang， Jilin and Liaoning province were quantitatively detected by ICP-MS， and the data were analyzed. The results showed that the contents of V， Cr， Ni， Mn， Zn， Ba， Fe， Mo， Cd， As， Pb and U in the samples of Eriocheir sinensis were significantly different (P < 0.05). Most of the elements showed a very significant correlation. Based on the mineral element content characteristics， the origin of Eriocheir sinensis samples in different provinces was determined by PCA， OPLS-DA and S-LDA. The results showed that PCA could only distinguish some samples， while the initial discrimination accuracy of OPLS-DA and S-LDA methods is 100%， the prediction ability of OPLS-DA was 71.4%， and the accuracy of S-LDA was 97.2%， which was the best method. The contents of Zn， Cr and Pb were important variables for tracing the samples of Eriocheir sinensis in three provinces. The results showed that the effective identification of the origin of Eriocheir sinensis under the co -cropping mode of rice crab in Northeast China can be realized based on the combination of element fingerprint and chemometrics analysis.