This article discusses the importance of Cleanroom doors in maintaining a clean environment and controlling contamination. The selection, installation, maintenance, and additional control measures of Cleanroom doors are crucial for ensuring the cleanliness and integrity of Cleanroom environments. Different types of Cleanroom doors (such as sliding doors, revolving doors, high-speed doors) have different characteristics and suitable applications, and choosing the appropriate Cleanroom door can effectively prevent contaminants from entering the Cleanroom interior. Regular maintenance and upkeep of Cleanroom doors, including cleaning, repairs, and replacements, help ensure their stable performance and continuous effective contamination control. Furthermore, incorporating advanced features such as air showers or interlocking systems with Cleanroom doors can further enhance contamination control within the Cleanroom environment.