Abstract: The paper analyzed the ECMWF 0. 25* 0. 25 latitude- longitude grid pattern data transferred by CMA. GrADS and Microsoft Visual Studio 2005 were used as the development tools to introduce the key technology of using multi- threading interpretation model products to form MICAPS user- defined format products for the reference of municipal and state level related personnel, thus enhancing their interpretation capability of similar data. The software has high data processing timeliness to provide important basis for weather forecasting.