Abstract: A new slag system was designed after analyzing several domestic and abroad basic slag system electrode coatings.The experiments were arranged by the uniform design method and computer software.Nine coating constituents were taken as independent variables and were divided into 6 levels in all 24 experiments.The 7 usability target data were put into computer to analyze statistically.The results give the mathematic model multinomial between independent variables and functions,which indicate the influence laws of many coating constituents on many targets.With computers and these mathematic models,many usability targets are optimized and the searching data are got,which give directions for improving usability of electrode.This search/calculating method is also a new attempt for improving electrode properties in an all-round way.