Abstract: Taking the coking coal applied in one coking plant in North China as object,analyse the properties of coal samples and additives,find their advantages and disadvantages,which provide the reference for the coal blending,then research the properties of blends and cokes.Based on the coal petrography and co-carbonization theories,replace parts of strong caking coal with tar pitch or petroleum pitch,or adopt coke powder and petroleum coke as leaning reagent.The analysis of additives function in blending coal show that,as one ideal adhesive,the most adaptive for pitch is 3 percent to 5 percent,for anthracite is 5 percent.Anthracite,coke powder and petroleum coke are common leaning reagents.In th aspect of improving coke abrasive strength,reducing volatiles,reducing ash and improving coke lumpiness,anthracite,coke powder and petroleum coke respectively is the best choice in turn.