Service bulletin (SB), which is a document issued by the civil aircraft manufacturer for releasing improvement, modification and inspection requirements for delivered products, is an important method for continuous improvement of products and maintain aircraft continued airworthiness in the entire service life cycle. Moreover, SB is the most standardized and widely used customer service document in the civil aviation field, the quality and management efficiency of SB directly represent the capability and quality of customer service that the manufacturer provided. This paper analyzes the domestic civil aircraft manufacturer’s SB production and management system from the regulatory and industry practice perspective, and puts forward the optimization proposal by reference to industry leaders'' experience.