In order to improve the problem of the storage of liquid microbial pesticide, the present technology improves the production process of water-dispersible granules (WG) in an environmentally friendly formulation, and this development suitable for the production of microbial preparations of endospore, for example : Bacillus thuringiensis and Bacillus amyloliquefaciens. The improved WG formulation with this technology can achieve good dispersibility, reduce dust and improve the convenience of using microbial pesticide. Compared with the traditional process, this WG formulation with simplified process steps could maintain the microbial activity and achieve the advantages of storage and transportation of the microbial formulation.