Abstract: It is known from the qualitative analysis for the magnetic force acting upon a magnetic charge that a part of the finite magnetic charges uniformly distributing in a round plane deposits upon the circular edge under the interaction of Coulombs repulsion to form a linear magnetic charge along the circular edge, and the rest can only be left in the round plane. This conclusion mentioned above is verified by the numerical calculation for the system of 19 and 20 magnetic charges: in the former 12 magnetic charges distribute uniformly along the circular edge, one stay on the centre of circle, and six distribute uniformly in the round from the circular edge 0.37R(R is the round radius); and in the later there are 18 magnetic charges along the circular edge and two magnetic charges in the round from the circular edge 0.70 R.