The invention relates to a simple smelting device and a using method thereof. The simple smelting device comprises an upper end cover, a middle glass cover and a lower smelting crucible. The upper end cover, the middle glass cover and the lower smelting crucible are sequentially connected in a coaxial mode. The simple smelting device is characterized in that the lower smelting crucible comprises a detachable funnel-shaped smelting groove, a sample smelting groove and an air inlet hole; the funnel-shaped smelting groove and the sample smelting groove are symmetrically distributed by using the circle center of the whole lower smelting crucible as the center; the funnel-shaped smelting groove comprises a funnel part and a rod-shaped sample mold part, the lower portion of the funnel part is movably connected with the upper portion of the rod-shaped sample mold part, the diameter of the lower end of the funnel part is smaller than the diameter of a rod-shaped sample mold, and the lower end of the funnel part is tilted upwards; the upper end cover comprises a fixed frame, a rotating table, an electrode hole, positioning clamps, a positioning rod and an air outlet hole; and the rotating table can rotate by 180 degrees so as to reduce ingredient unevenness caused by arc blow.