The paper aims at the complexity of syntactic network and the feasibility that the complex network work as a means of linguistic studies.The paper proposes the method how to build a syntactic based on dependency treebank and investigates the complexity of Chinese syntactic dependency network based on two Chinese treebanks with different genres.The results show that syntactic networks have similar average path length and diameter with the random networks,but cluster coefficients of syntactic networks are much greater than that of random networks,and degree distributions of syntactic networks also obey the power law.The paper reveals that two syntactic networks have the same diameter,but with different average degree,path length,cluster coefficients and power exponent.