Abstract: A key obstacle to high accuracy location is the Non-Line-of-Sight（NLOS） transmission of signal in wireless localization.It adds positive error to Time of Arrival（TOA） measures.This paper presents a new location algorithm——Distance Geometric Location（DGL），based on the TOA range measurements.It forms distance error optimization constraint using the geometric relationship between the base stations and mobile station，and improves the location accuracy by modifying the distance measurements.Simulation results show that this new algorithm can efficiently reduce the effect of the NLOS error，and is robust to different NLOS error.