Abstract: This paper deals with the application of interactive graphics technique in the field of five-axis NC programming. The structural characteristics of graphics inspection, modification and display in the process of programming are discussed. A number of efficient graphics checking methods and realtime modification measures are presented based on the results from five-axis cutter location computation of impeller parts. The results of programming and trial cutting of impeller part show that these methods and measures are effective to improve programming quality and shorten programming period.