It provides an efficient, flexible and reliable decision support system for power grid, and studies the auxiliary decision-making platform for power grid production based on cloud computing. With the support of cloud computing architecture, the overall architecture of power grid decision support platform is designed from three levels of decision support layer, information layer and basic application layer. In terms of platform hardware, the power grid production file storage and interaction module, production monitoring module and fault alarm module are designed. In the platform software part, cloud computing technology is used to classify the production data of the power grid, and generate production auxiliary decisions for the power grid according to the operation status of production equipment. The test results show that the designed platform can reduce the data transmission delay, reduce the failure rate, and meet the functional requirements of power grid production decision support.