The morphology of surface disperse strengthening by laser-guided discharge(LGD) is investigated,including the surface morphology and the cross section morphology of the strengthened area. It is found that the arc pressure can form the special morphology on the surface of the strengthened area in the process of arc discharge. The large current with the tilted discharge is liable to blow the melted metal up and forms the pit and bulge on the surface of the strengthened area,while the small current with the perpendicular discharge structure is liable to form the flat surface of the strengthened area and to increase the thickness of layer strengthened. The ratio of diameter versus thickness of the strengthened area is decreased when the discharge pulse-width is increased. In the same thickness of the strengthened layer,the low current and the long discharge pulse-width is liable to form the small ratio of diameter versus thickness of the strengthened area,while the high current and the short discharge pulse-width is liable to form the big ratio of diameter versus thickness of the strengthened area. Under the present experimental condition,the maximum thickness of the strengthened area is 0.479 mm,and the ratio of diameter versus thickness of the strengthened area is 3.9,when the current is 150 A and discharge pulse-width is 9.83 ms.