Abstract: In this paper, the relations between observation data of the cobie-strai nmeter and string-frequency borehole stainmeter installed in the same position have been theoretically infered. Then, for the actual observation data obtained by two types of strainmeters in Jiangsu province, we made a correlation analysis. The results show a good correlation betwen them, and are consistent with the theoretical calculation results. Finally, the causes of the difference between the theoretical and actual proportional factors have been discussed.