Due to the shortcoming of MBLA(midnormal-based area localization algorithm) which has low localization precision and more iterative times,this paper proposed TBLA(triangle-based localization algorithm).This algorithm used two RSSI ranging values between the node to be localized with two anchor nodes,and then constructed a triangle to locate the unknown node.Simulation result shows that TBLA's locating error is only 1/5 of MBLA's,and more importantly,the iterative times are less 1/3 of MBLA's in the same com...