Electric thruster position keeping thrust distribution method and system

The invention discloses an electric thruster position keeping thrust distribution method and system, and the method comprises the steps: determining the normal pointing gears of two electric thrusters according to the position keeping drift rate control quantity; according to the determined normal direction pointing gears of the two electric thrusters, obtaining the target thrust direction [Xn, Yn, Zn] of the first electric thruster and the starting time [delta]tn through calculation, and obtaining the target thrust direction [Xs, Ys, Zs] of the second electric thruster and the starting time [delta]ts through calculation; calculating to obtain a first theoretical vector adjusting mechanism rotating speed omega n and a second theoretical vector adjusting mechanism rotating speed omega s; and distributing [Xn, Yn, Zn] and [delta] tn to the first electric thruster, [Xs, Ys, Zs] and distributing [delta]ts to the second electric thruster, distributing omega n to the first vector adjusting mechanism, and distributi