Abstract: The forecast and early warning platform of sand-dust weather in Dalian had been developed in order to improve the forecast and early warning service in the lower reaches of sandstorm region. Based on the introduction of design idea, structure and feature of the platform, the forecast and early warning flow of sandstorm was described. The principles such as early warning causing sand-dust and fuzzy discriminant analysis were discussed, and its test results were analyzed. The results show that the platform is practical, whose running flow is in accord with the forecaster’s work flow. It can be applied in real time operation. It could satisfy the demand of sand-dust weather forecast in Dalian, and provide strong technical support for the forecast and early warning service of sand-dust.