The invention relates to a coal blending and coke making process using waste plastic, which includes adding waste plastic and coal-tar pitch into melting furnace with a weight ratio of 1: 1.5-5, congruent melting at temperature of 150-380 DEG C; cooling to 20-40 DEG C, grinding to obtain mixture powder of waste plastic then adding into mixed coal, the weight of adding mixed powder is 2-6% of total weight of mixed coal, mixed coal charged with mixture powder of plastic is grinded by grinder and then delivered to coal tower of coke oven to make coke finally. The inventive process combines with conventional procedure, fully utilizes residual heat of coal-tar pitch.