The invention relates to a chain press fitting method and belongs to the technical field of a chain transmission part machining machine of a common part of a machine. The chain press fitting method comprises the following steps of: (1) providing a press fitting assembly; (2) assembling an inner lower chain plate and a sleeve; (3) covering a roller on a sleeve; (4) arranging an inner upper chain plate into the upper end of the sleeve; (5) assembling two pin shafts and an outer lower chain plate with one ends of two inner single sections; and (6) assembling an outer upper chain plate with the two pin shafts. When the assembling is started and a single-pitch chain needs to the assembled, any two adjacent colliders are mounted on pressing die collider seats of a single-double-pitch chain common type assembling machine; and only the colliders at the two sides are mounted on the pressing die collider seats when a double-pitch chain needs to be assembled. Preferably, five pressing die collider seats are arranged; and each pressing die collider seat corresponds to the press fitting step. According to the chain press fitting method disclosed by the invention, the single-pitch chain can be mounted on one assembling machine and the double-pitch chain can also be assembled.