Abstract: Complex network,as an abstract description of complex system,can be used as a modeling tool for the relationship network of characters in literary works.Taking 108 characters in Water Margin as the research object,the complex network analysis method is used to construct and analyze the relationship between the characters in the work,in which the characters in the novel correspond to the nodes in the network,and the relationship between the characters corresponds to the edges in the network.We searched the names of the characters manually,and constructed the network based on the co-occurrence relation of any two characters in the same chapter.We calculated network indicators such as calculation,meso,agglomeration coefficient,sparsity,correlation,etc.The results show that the relationship network of characters in"Water Margin"is a heterogeneous network and has the characteristics of small world and community.