A social network is constructed based on local telephone call records in a city and the topological characteristics of the network are measured.This social network shows some same characteristics as those of other social networks,such as power law of degree distribution,small world effect,non-trivial clustering or network transitivity,and it also shows the property of assortative mixing which is different from other social networks.Then,by endowing the edge valus,the strength of vertex distribution,degree correlation and clustering coefficient of weighted network are analyzed.