As an accurate fault location technology， the travelling wave location method has been widely used in the power system. With an increase of the number of the travelling wave devices， the travelling wave network can now be built. Based on a travelling wave propagation analysis， the double ends method is extended to suit the wide area travelling wave location. A scheme is proposed to obtain the effective disturbance area of the travelling wave network， and an algorithm is constructed simply using the travelling wave information. The algorithm can tell the disturbance line and give the precise location of the disturbance by selecting effective records. A field case shows the effectiveness of the algorithm proposed.