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ARINC659 backplane bus is a key component of the integrated modular avionics system,It is gradually applied for Avion and Civil Aircraft. This paper introduces the electrical performance characteristics, analyzes the requirement of design and processes the application practice, In the use, Some problem about signal quality appears, By means of measuring and analyzing the signal wave, emulating the model, gaining that Parasitic capacitance and Parasitic inductance are the main factors influencing the signal quantity and testing pathologically, By the way of improving the design, cutting down the length of ARINC659 bus signal , Parasitic capacitance and Parasitic inductance are reducing properly , the improved design advances the signal quantity highly, meet the requirement of electrical design of ARINC659 bus and passes the experimentation.