Abstract: With the advantages of accurate boundary-layer simulation and high computational efficiency, structured grid is widely used in the Computational Fluid Dynamics (CFD) research and engineering applications. However, the grid generation of complex model is very time-consuming, which usually requires frequent interactive operations in the graphic software. To solve this problem, we propose acceleration techniques in grid generation, such as boundary-layer generation, rapid block assembly, rapid adjustment of grid distribution and grid optimization of dirty model. Relying on National Numerical Windtunnel (NNW) project, we develop NNW-GridStar, a general structured grid generation software. This software supports the automatic generation of boundary-layer gird and has great advantages in the generation acceleration of volume grid, greatly improving the generation efficiency. Compared with Pointwise, NNW-GridStar generates grid faster and the quality of the generated grid is equivalent. A large number of complex cases show that NNW-GridStar meets the requirements of engineering applications. Since the release, this software has been downloaded and used by more than 80 scientific research institutes, greatly supporting the practical engineering tasks.