Designing message priority is one of the key problems in terms of CAN network integrating in hybrid electric vehicle (HEV). Based on the analysis of structure of automotive network and real-time of message, the EDF algorithm was introduced into the design of system integrating, and the policy of priority designing based on EDF was built. Furthermore, the non-uniform code method and its schedulability condition were described, and the conclusion that before it was presented the partition factor had nothing to do with the schedulability was put forward. The result of the simulation indicated that the method could not only schedule the message set in which the deadline changed a large-scale range, but also had the low network utilization.