The selection of the network nodes and the optimization are very important aspects in wireless sensor networks. In this paper, we introduced briefly the basic principles of the algorithm first, and introduced the GB (Grid-Based) node choice algorithm amply. In succession, the performance for above algorithms was analyzed. Based on performance analysis, some optimizing strategies were put forward. Through relevant simulation experiments, it proved that the optimized algorithm is more accurate and efficiency, the above method would have a certain value ofapplication.