The invention discloses an assembly mechanism applied to a connector lamination. The assembly mechanism comprises a cutting region, a lamination region and a buffer region, wherein the buffer region is arranged between the cutting region and the lamination region and comprises a rotary disc and a plurality of stations, the plurality of stations are arranged on the rotary disc and can rotate together with the rotary disc, a feeding station is correspondingly arranged below the cutting region, a lamination station is correspondingly arranged below the lamination region, and a cleaning station is used for cleaning excessive laminations. In a connector lamination tool, a concept of the buffer region is applied into the assembly mechanism, unbalanced material supply caused by incoming material quality is prevented, the probability of machine stopping is reduced, the requirement on the speed of the buffer region is greatly reduced, the assembly periodic time of a connector is prevented from being affected by the incoming material quality, and the overall periodic time of a device cannot be affected. Moreover, the assembly mechanism is further beneficial for promoting production efficiency, and manpower resources are saved.