With the continuous development of electronic information technology， the integration and complexity of radar products are increasing， and the materials delivered by the product are difficult to guide the user to troubleshoot the product failures comprehensively and effectively. Furthermore， in the process of product usage， a large amount of fault data have not been effectively utilized. The data-based rapid troubleshooting technology for radar products uses a large amount of usage data of radar products as the main input， using hierarchical reasoning to aggregate search technology models， starting with the hierarchical structure of radar products， analyzing the relationship between functional failures and system failures， and using the propagation path of the directed graph to form a fault correlation matrix. Based on the fault correlation matrix， the technology infers effective troubleshooting strategies through the input of fault phenomena and other data， and forms guidance documents in the form of troubleshooting guides to guide users to quickly locate faults， solve problems， and improve uses’ own troubleshooting capability.