In view of the problems of traffic signs line interfering vehicles extracting in the remote sensing image, a method based on grey scale mathematical morphology and bilateral filtering for removing traffic signs line is presented. Applies the geometric structure characteristics of traffic signs line and vehicle targets to design specially morphology structural elements for roughly filtering traffic signs line, then designs a bilateral filtering method of adaptive setting the gray variance for fine filtering the picture. The test result shows that the algorithm has better effect in eliminating the traffic signs line in remote sensing images.