In this paper,both the analysis of repeat drill and foundtion of repeat Drill and math have been investigated based on the research achievement of the repeating sharpening of twist drill at home and abroad. math model based on sharpening theory of drill have been founed and analyzed. Then corresponding soft have been made by using rapid application development-C++Builder and relative database management system soft-acess . The drill parameter have been calculated and optimized and database also have been founded. drill tine rear has been emulated base on model and matlab soft by using parametrization modelization. According to these data ,drill tine have been emulated by using tridimensional modelization soft.