The invention discloses a production method of low-carbon low-
silicon cold heading steel. The steel comprises the following chemical components including, by weight, 0.02%-0.20% of C, less than or equal to 0.06% of Si, 0.25%-0.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.005% of S, more than or equal to 0.020% of Al and the balance Fe and inevitable impurities. A smeltingprocess includes converter-LF furnace-VD furnace-square billet
continuous casting. In the converter working procedure, the Si in
molten steel is less than 0.01%, and the Al is equal to 0.015%-0.040%;in the LF working procedure, the Al is equal to 0.015%-0.040%, in final
slag components, CaO is equal to 54%-62%, Al2O3 is equal to 31%-38%, SiO2 is less than or equal to 2.0%, MgO is equal to 3%-7%,and TFe is less than or equal to 0.8%; the Al is increased to 0.055%-0.070% before leaving a
station, and the Si in the
molten steel leaving the
station is smaller than 0.04%; the VD is kept in vacuumfor 5-7 min, soft blowing is carried out for more than or equal to 18 min after vacuum breaking for coming to the
station, and the Ca in the
molten steel leaving the station is equal to 0.0015%-0.0030%; in the
continuous casting working procedure,
tundish gas driving is conducted after a
tundish car is in place before large
ladle casting, and gas driving operation continues to be conducted afterlarge
ladle casting; when the liquid level of the molten steel in a
tundish reaches 280-320 mm, a covering agent starts to be rapidly put into the tundish till the molten steel surface is completely covered; and after the liquid level of the molten steel in the tundish reaches 650 mm, tundish
casting is organized. According to the production method, the
castability of the molten steel of a castingfurnace for producing the low-carbon low-
silicon cold heading steel by a billet
caster can be greatly improved.