A method for smelting magnesium quickly and continuously, characterized by comprising the following steps of: Step 1: ingredient preparing and pelletizing ingredient preparing: preparing ingredients of dolomite, 75 Si-Fe alloy and fluorite at the mass ratio of the dolomite to the 75Si-Fe alloy and the fluorite being110:: (3.0-4.0), uniformly mixing the prepared ingredients so as to obtain a mixture, and then adding soluble glass as a bonding agent which accounts for 1.0-2.0% of the total mass of the prepared ingredients and water which accounts for 2.0-5.0% of the total mass of the prepared ingredients; or, preparing ingredients of dolomite, A1 and fluorite at the mass ratio of the dolomite to the Al and the fluorite being 115:: (2.0-3.0), uniformly mixing the prepared ingredients so as to obtain a mixture, and then adding soluble glass as a bonding agent which accounts for 1.0-2.0% of the total mass of the prepared ingredients and water which accounts for 2.0-5.0% of the total mass of the prepared ingredients; pelletizing: uniformly mixing the prepared ingredients so as to obtain a mixture, pelletizing the mixture so as to obtain pellets with the particle size of 5-20mm, and naturally drying the pellets for 10-24h; Step 2: pellet calcining placing the dried pellets in a high-temperature furnace, a rotary kiln or a fluidized bed, heating the dried pellets to 150-250 DEG C, keeping the temperature for 30-60min, dehydrating the dried pellets after the temperature is kept, then heating the dehydrated dried pellets to 850-1050 DEG C under an argon or nitrogen atmosphere, keeping temperature, and performing calcination for 30-120min; Step 3: continuous high-temperature reduction of calcined pellets without being cooled continuously feeding the high-temperature calcined pellets under argon protection into a closed high-temperature reduction furnace, then performing a high-temperature reduction reaction in a flowing argon atmosphere with the reduction temperature of 1300-1600 DEG C, the reduction time of 20-90min, and the argon flow rate of 2.0-5.0m 3 /h in order to continuously obtain high-temperature magnesium steam, mixing the magnesium steam with argon gas to form a high-temperature gas mixture, and besides, continuously discharging reduction slag out of the high-temperature reduction furnace; and Step 4: condensing of high-temperature magnesium steam enabling the high-temperature magnesium steam to be carried out of the high-temperature reduction furnace by the argon flow, and to be delivered through a sealed pipeline to a condensation system for condensation so as to obtain metal magnesium. Step 1: ingredient preparing and pelletizing ingredient preparing: preparing ingredients of dolomite, 75 Si-Fe alloy and fluorite at the mass ratio of the dolomite to the 75Si-Fe alloy and the fluorite being110:: (3.0-4.0), uniformly mixing the prepared ingredients so as to obtain a mixture, and then adding soluble glass as a bonding agent which accounts for 1.0-2.0% of the total mass of the prepared ingredients and water which accounts for 2.0-5.0% of the total mass of the prepared ingredients; or, preparing ingredients of dolomite, A1 and fluorite at the mass ratio of the dolomite to the Al and the fluorite being 115:: (2.0-3.0), uniformly mixing the prepared ingredients so as to obtain a mixture, and then adding soluble glass as a bonding agent which accounts for 1.0-2.0% of the total mass of the prepared ingredients and water which accounts for 2.0-5.0% of the total mass of the prepared ingredients; pelletizing: uniformly mixing the prepared ingredients so as to obtain a mixture, pelletizing the mixture so as to obtain pellets with the particle size of 5-20mm, and naturally drying the pellets for 10-24h; Step 2: pellet calcining placing the dried pellets in a high-temperature furnace, a rotary kiln or a fluidized bed, heating the dried pellets to 150-250 DEG C, keeping the temperature for 30-60min, dehydrating the dried pellets after the temperature is kept, then heating the dehydrated dried pellets to 850-1050 DEG C under an argon or nitrogen atmosphere, keeping temperature, and performing calcination for 30-120min; Step 3: continuous high-temperature reduction of calcined pellets without being cooled continuously feeding the high-temperature calcined pellets under argon protection into a closed high-temperature reduction furnace, then performing a high-temperature reduction reaction in a flowing argon atmosphere with the reduction temperature of 1300-1600 DEG C, the reduction time of 20-90min, and the argon flow rate of 2.0-5.0m 3 /h in order to continuously obtain high-temperature magnesium steam, mixing the magnesium steam with argon gas to form a high-temperature gas mixture, and besides, continuously discharging reduction slag out of the high-temperature reduction furnace; and Step 4: condensing of high-temperature magnesium steam enabling the high-temperature magnesium steam to be carried out of the high-temperature reduction furnace by the argon flow, and to be delivered through a sealed pipeline to a condensation system for condensation so as to obtain metal magnesium.