One of the important research areas in WSNs topology control is how to design the clustering algorithms on condition that nodes know their precision position. This paper presents an in-depth study on topology control in order to improve energy efficiency. It proposes a novel topology control scheme, and simulates the scheme in MATLAB. The results show that the energy consumption of the scheme is low, and the proposed scheme is fitful for the large scale networks and can effectively stretch the lifetime of WSNs.