Abstract: Because the location of moving objects is frequently updated in moving objects databases，it is the issue to be solved how to manage the updating of the moving objects trajectory （location） in moving objects databases.This paper proposes the general updating system of the moving objects trajectory which solves the issues in the updating policies of the moving objects trajectory.The trajectory of moving objects is firstly defined，and then the updating policies of the moving objects trajectory are induced to two kinds：point & vector，which is on the basis of modeling the trajectory of moving objects in this paper.This paper also describes the updating principle & algorithm of the trajectory of moving objects，and compared two kinds of updating policies in the simulated experiment.