Abstract: Aiming at the shortcomings of the existing micro-source localization algorithm based on the uniform speed assumption and the iterative method leading to large amount of calculation and poor robustness,a new method of micro- source location considering the velocity anisotropy was proposed through the transformation of time-distance equation. The new method used six effective detector data to implement positioning. Stochastic simulation method was applied to produce a large number of source alternative solutions considering the complexity of wave velocity characteristics. Final source solution was discussed from the angle of information fusion,the gross error criterion and the clustering analysis method was used to obtain the source solution. The examples show that the analytical method is correct and reasona- ble,and the information fusion method is scientific and reasonable,and suggest the final micro source is determined through gross error criterion.