Hadoop-based knowledge management systems can enhance corporate ability to store and process massive knowledge and realize knowledge discovery oriented to management decisions. Through studies on Hadoop platform and its characteristics, the advantages of Hadoop-based knowledge management systems were analyzed, a Hadoop-based corporate knowledge management framework model was built, and a logical framework was designed for Hadoop-based knowledge management systems. Eventually, detailed design was done on the knowledge recommendation module by applying MapReduce-based collaborative filtering algorithm. With knowledge management systems being built based on Hadoop and other big data technologies and recommendation system technologies, knowledge management can be personalized and intelligentized, and the scalability and economic demands of corporate knowledge management systems can be met as well.