The automatic recognition of Chinese modality’s usage is an important task for building Chinese modality knowledge base.This paper focuses on the problem of the recognition of Chinese modality’s usage for multi-corpus.It modifies the modality’s usage dictionary and the modality’s usage rules base from the real usage of Chinese modality of multi-corpus. The experiments show that the recognition precision rate of modality’s usage is higher than before and the applicability of Chinese modality knowledge base is enhanced.