A hybrid wind and solar power microgrid is typically comprised of multiple distributed energy sources, such as wind turbines and photovoltaic systems. Each of these energy sources exhibits unique current and voltage response characteristics, contributing to the composite nature of the input power signal. This composite nature poses significant challenges to the transient response control of hybrid wind and solar microgrids, often leading to high voltage fluctuations. In order to improve the stability and reliability of hybrid microgrid operation, a transient response control method for microgrid based on composite information fusion is proposed. Firstly, an analysis was conducted on the topology structure of the wind solar hybrid power generation microgrid, clarifying the system composition and connection relationships, laying the foundation for subsequent transient response control. Secondly, sensors and communication modules are utilized to collect data from the hybrid wind and solar power microgrid. The composite information fusion technology is utilized to fuse the microgrid data. On this basis, the transient response control strategies for isolated and grid-connected operation are designed. Finally, the control commands are executed and feedback is provided. After experimental verification, it is known that this method significantly reduces the voltage and power fluctuations of microgrids in the transient stage, thereby effectively improving the quality of electrical energy and the stability of the entire system.