Focusing inversion is accomplished by the iterative of abnormal source to make the image gradually focused． It can better reflect the underground geological geometry and physical parameters． The model experi- ments in the study show that gravity focusing inversion allows inversion image stabilization and polymerization， which solves the multiple solutions and instability of inversion and so on． The method is applied to measured gravity data processing of certain region of Changbai Mountain，compared to Euler deconvolution，the results show that the method for determining the horizontal position and depth of underground anomalies has good ef- forts．