The invention relates to a method for producing common oriented electrical steel through low-temperature slab heating, belonging to the oriented electrical steel technical field. The method comprises the following steps: firstly, a slab is placed into a heating furnace between 1,200 and 1,300 DEG C for heat preservation for 2 to 6 hours and then hot rolled; secondly, a hot rolled plate undergoes acid cleaning and then cold rolling for two times; thirdly, a cold-rolled plate undergoes recovery annealing instead of primary recrystallization annealing; and fourthly, finished products of secondary recrystallization textures are obtained after final coating and high-temperature annealing. A CuS+Mo inhibitor is formed by addition of Cu, S and Mo in the oriented electrical steel. The method has the advantage of capability of reducing the slab heating temperature.