The present invention, belonging to the field of computer security, relates to a copyright protection method for digital watermark of a value-type relational database, and in particular provides an embedding and extraction and verification method of value-type relational database watermark. The method comprises: mode and data analysis of a value-type relational database, generation and embedding of digital watermark, and detection method of digital watermark. According to the present invention, considering the characteristics of the value-type relational database, digital watermark information can be effectively, dynamically and uniformly injected to data, and the digital watermark information can be extracted in case of no data source. The method employs such technologies as key encryption and anti-repetition sequencing, can effectively resist various watermark attacks, and can ensure no watermark loss in case of row modification lower than 50%.