Abstract: in order to improve the quality of coke, especially the coke reactivity index( CRl )and cokestrength aftreacton( CSR),he infuencefactors of optimizng coal blending coking from the perspective of virinie refectance were researched. The properies of eight ins ofcoking coal was analysed.and coke qu lity were researched prepared by single coal and coal blending. The results showed that the effc of diffrent coal on the coal blending coking was difiecent.A.codingtothe pimoiple of coal petrography blending based on the analysis of the ssues of previous coal blending scheme in a certain enterprise,the maximun vitrinte refectance( Rmax)and virinite refiectance distribution fgures were selected to the guide of optinizatio of coal blending and the six optimum schemes were pu fowarcd.Tmhe resut showed that the blended coal's Rmaxand the refectance distrbuton figures were twv fectiv adjustment parameters of optimizingthe coal b ending. Throughthe optimizton of coal blending scheme,pariculate coke's CRliwas decreased by 1.95% and CSR'was increased by 3.45%,the coke s thermal stength was greatly improved.