For the application of high performance data communication and processing in parallel computer system, the computer data communication scheduling technology is analyzed. Use central control computer page memory mapping, build the shared bus interconnection of parallel computer system and realize interconnection, and the application, identification, arbitration and execution mechanism of data communication scheduling are proposed and applied in phased array guidance radar. The actual application results show that this technology can effectively improve the performance of parallel computer system, and fully meets the requirements of the product for the real-time system performance of calculation and processing.