A design scheme using IEEE1394 serial interface to achieve communication between PC computer and DSP controller is introduced, which is used in real-time imitating for car-engine integrated controlling system. First, the rule of high speed IEEE1394 serial communication using TSB41BA3/TSB12LV01B interface is discussed. Further, the design scheme of software and hardware of communication sub-system is probed. The application effect is good in the car-engine integrated controlling system developed.