The present invention relates to the technical field of steel-making, and discloses a low-carbon steel for deep drawing and a smelting method thereof. The method comprises: adding desulfurized molten iron into dephosphorization converter and decarbonization converter for duplex smelting; blowing in decarbonization converter and directly tapping, which is tapping without converter deoxidation; carrying out light treatment refining process on the molten steel after tapping to obtain low-carbon steel for deep drawing. The method not only shortens the refining cycle, but also reduces the cost of smelting.