Double evidence method is a method that combines literature analysis with archaeological evidence system proposed by Wang Guowei, a famous scholar in modern times. Value: Wang Guowei's "Double Evidence Law", as a new concept, academic responders are not only biased towards ancient times, but also have a positive impact on the academic circles in the 20th century, which is also the reason why China's modern scholarship is the most fruitful document. Significance: This double evidence law came into being today. It means that it has become a recognized mainstream of scientific learning to consider ancient history and culture with the mutual confirmation of "new underground materials" and ancient literature records.