The invention discloses an aluminum electrolysis multifunctional unit communication system. The aluminum electrolysis multifunctional unit communication system comprises at least one crown block, a receiving module used for receiving control commands of the crown blocks, and a control module, wherein the control module communicates with the crown blocks through a cable so as to control the crown block to conduct corresponding actions according to the received control commands of the crown blocks during aluminum electrolysis production. The communication system disclosed by the embodiment of the invention can achieve coaxial-cable communication, optical fiber communication is replaced, the using efficiency of equipment is improved, the overhaul cost is lowered, and the effect that production is conducted normally and orderly is effectively ensured.