Comparative study about the calculation of cylindrical gear drive design are processed between the standards of ISO/GB and AGMA
then the specialty of calculating formulas is researched and the meaning and selection of relative fators are investigated.The study indicates:compared with the calculation of ISO/GB
numeric design and frame optimization in gear drive are implemented conveniently with the one of AGMA
but the conclusions from the two calculation of spur gear drive design lean to conservation.