This article focuses on in-depth exploration of the later maintenance and troubleshooting of CT machines. Firstly,the key significance of regular maintenance of CT machines was emphasized,and it was explained in detail that it covers daily cleaning work to maintain equipment cleanliness and avoid dust and other impacts on performance;It also includes performance checks to ensure that all indicators are within the normal range and to ensure imaging quality. Next,conduct a thorough analysis of common types of faults,such as hardware failures that may originate from tube aging,detector damage,etc.,while software failures may be caused by program vulnerabilities or system conflicts. For these faults,specific maintenance methods and strategies were elaborated,such as precise replacement or repair measures for hardware faults,as well as program debugging and data recovery methods for software faults. In addition,the importance of professional maintenance personnel throughout the entire process is highlighted,as their professional knowledge and skills are key to solving problems. Finally,it is emphasized that it is necessary to establish a comprehensive and effective maintenance system for CT machines through scientific planning and strict implementation. Through comprehensive and in-depth research,it provides valuable reference and practical guidance for improving the reliability and extending the service life of CT machines.