The invention discloses a machine core and a multi-currency distribution assembly line thereof. The multi-currency distribution assembly line comprises a machine core module, a plastic package module,a sorting assembly line and a mechanical arm. The machine core module is used for storing paper currency and outputting the paper currency to a currency receiving hopper of the module according to the system instruction, the mechanical arm is used for conveying the paper currency in the currency receiving hopper to a plastic package feeding mechanism of the plastic package module, a plastic package machine carries out plastic packaging on the stacked paper currency and then outputs the paper currency to a stacking mechanism, the stacking mechanism stacks the same kind of the paper currency and outputs the paper currency to a sorting conveying mechanism of a sorting assembly line from a currency outlet, and the side face of the sorting conveying mechanism communicates with a sorting framethrough a sorting inclined plate. Due to the array type machine core, each machine core body stores different kinds of paper currency, the mechanical arm conveys the paper currency output by the different machine core bodies to the plastic package module to be subjected to plastic packaging, then the paper currency is conveyed to the sorting assembly line, currency distribution, packaging and sorting are further finished, the currency distribution efficiency is greatly improved, and the manual errors brought by manual operation can be reduced to the maximum.