The invention discloses a realization method of a full car communication system based on a formula student race car. The method comprises following steps of determining data needing to be collected for an all-electric race car of this time; determining modules using CAN bus communication according to demands; setting CAN bus priories, wherein a protocol identity ID is set for each module; setting a CAN bus protocol, wherein the bus protocol is set according to using demands; developing and designing CAN communication programs; and testing and analyzing the CAN bus communication.