Using the calcium silicon carbon deoxidizer, applied to the 20 MnSi deoxidization process, alloy yield increased significantly, Mn yield from 84.78% to 94.9% increased by 10.19%.Si increased from 79.43% to 88.85%, increased by 79.43%.AI from 8.38% to 16.53%, increased by 8.15%, is almost 2 times. Applied to carbon steel, alloy yield increase is also obvious, while reduce the dosage of ferroalloy Si increased by 6.53%, a 8.83% increase in Mn, in a word, using the calcium silicon carbon deoxidizer process, no matter in the production of 20 Mn steel or carbon steel guitar mechanics performance is good, just stable chemical composition, and the desulfurization performance, the desulfurization rate of 22.73%.