In selective laser melt (SLM) molding process, the edge position is usually higher than the inner surface, which is also called elevated edge phenomenon. Elevated edge has bad effects on SLM molding process. We theoretically analyze the production mechanism of elevated edge in SLM molding process, and propose a contour-entity control method and an edge remelting control method. Effects of processing parameters on edge height are studied. Processing parameters include contour spacing, border thickness, scanning speed and laser power. Results show that these methods can effectively reduce the elevated edge. For the contour-entity control method, the height of elevated edge decreases with the increas of scanning speed, increases with the increas of laser power, and is not susceptible to contour spacing. For the edge remelting method, edge height decreases with the increas of scanning speed, and increases with the increas laser power and contour thickness.