The invention discloses a blending method of medium-volatile component low-expansion high-shrinkage coking coal, belonging to the technical field of metallurgical coal blending for coking. The blending method comprises a step of blending coking coal for coal blending, wherein the coking coal comprises the following components in percentage by mass: 15-33% of coal sample 1#, 5-20% of coal sample 2#, 0-15% of 1/3 coking coal, 30-50% of coking coal and 12-28% of meager-lean coal; the volatile component Vdaf of the coal sample 1# is 25-35%, the expansion degree b is less than 15%, the shrinkage degree X is greater than 25mm, and the caking index G is greater than or equal to 75; the volatile component Vdaf of the coal sample 2# is greater than or equal to 40%, the expansion degree b is greater than or equal to 80%, the shrinkage degree X is greater than 25mm, and the caking index G is greater than or equal to 80; the volatile component of the 1/3 coking coal accounts for 28-37%, the shrinkage degree X is greater than 25mm, and the caking index G is greater than or equal to 80; the volatile component of the coking coal accounts for 20-28%, and the caking index G is greater than or equal to 80; and the volatile component of the meager-lean coal accounts for 15-20%. In the blending method disclosed by the invention, the medium-volatile component low-expansion high-shrinkage coking coal is blended as basis coal into high-volatile component high-expansion coal with high plastic mass ductility to obtain high-quality coke.