The embodiment of the invention discloses a magnesium smelting method. The magnesium smelting method comprises the following steps of: step (1). mixing a magnesium-containing raw material, a reducingagent, a mineralizer, and a pore-forming agent according to a certain proportion to obtain a raw material mixture; step (2). carrying out compression molding on the raw material mixture under the pressure of 50 to 300 MPa to obtain raw material pellets; step (3). carrying out heat treatment on the raw material pellets at a temperature not higher than 1000 DEG C, and carrying out heat preservationfor a certain period of time to obtain porous pellets; step (4). causing the porous pellets to chemically react at a temperature higher than 1100 DEG C to generate magnesium vapor; and step (5). causing the magnesium vapor to enter a low temperature zone, and condensing to obtain crystallized magnesium. The magnesium smelting method disclosed by the embodiment of the invention effectively improvesthe diffusion rate of magnesium vapor inside the pellets, shortens the time for chemical reaction to reach equilibrium, improves the chemical reaction rate, magnesium reduction efficiency and production efficiency, shortens the reduction cycle, and reduces the energy consumption and production cost.