By using 8 Digital Signal Processing (DSP) microprocessors , the principle and structure for designing an aeroengine digital simulator are presented. Based on a multi-port memory , a common shared memory is designed and its characteristics are discussed. An aeroengine simulation model is executed on the master/slave simulator system controlled by a PC computer , and the task assignment method is given. The time of computing themodel by one processor is compared with the time by two processors.