The key mechanism of strong target influence over the STAP nonhomogeneous detector was analyzed. Then, considering the declining performance of nonhomogeneous detector with strong interference targets, and the high computational complexity of traditional APR method, a new nonhomogeneous detector based on local template was presented. Compared with the traditional methods, the method proposed can obtain high computational efficiency and more robust detection performance. Finally, experiments with the actual data proved the effectiveness of the proposed model.