An automatic parameter design process is developed for a lead-compensator in a focusing control system on a commercial optical disk drive. In the frequency domain the automatic design process of focusing a pick-up head controller can apply a set of control parameters to the lead compensator, designed by Matlab software to provide a convenient and fast operation. After the actual system parameters are identified by an auxiliary experiment, the appropriate control parameters can be obtained and the hex code for the digital signal processor (DSP) on the player generated by the proposed automatic design program. The practical performance of the control system can be improved via the design process.