Multilateral localization algorithm is a commom algorithm for wireless sensor networks（ WSNs） node localization.Aiming at problems shown in relevant literatures related to estimation value of blind node coordinate and number of nodes in multilateration algorithm

present a multilateral localization algorithm based on minimum error sum of squares.Error sum of squares generated by different reference node as elimination object is different

and by selecting the minimum value of error sum of squares to determine the optimal estimated value of position.The localization experiment is designed with the chip of CC2430

and analyze datas by upper PC.The experimental results show that this algorithm can effectively reduce localization error

the biggest localization precision is increased up to 3.6 m.