In order to solve the problem of the way for machining rotary burrs with handing mode, analyze the configuration of the 5_Axis grinding machine, establish appropriate math model, adopt differential technique to machining rotary burrs. Educe linear equation of sphere helix, if we have the movement axis data of one axis, we can calculate the movement axis data of other axises. Then we insert these data into the system, after calculate these data by the system, we can get the machining data and control the machine. Factual applications show that the way can solve the machining rotary burrs problem very well.