This paper presents a new method for the detection of an un-cooperated target in pulsed laser ranging.Several nodes near the peak value of the correlation detection are adopted to interpolate,are assigned with different weight based on the distance to the peak value,and weighted average is carried out so that the exact position of the un-cooperated target will be gained finally.This method takes full advantage of the multiple messages near the peak-value of correlation detection so that the influence from the single sampling node to the precision of detection can be avoided,and the precision and stability of location are enhanced notably.Experiments show that the precision can be increased by about 100% compared with that only used correlation detection.