In order to analyze the error caused by the friction in aspect of the parameters of servo control system, a model was built based on the experimental platform and a precise friction model was built based on identification of the experimental results. The variation of quadrant error was studied in time domain and frequency domain respectively under condition of different parameters of servo control system. The law of influence of each system parameters on quadrant friction error was summarized. The results can be used as reference for the tuning and optimizing of the parameters of servo control systems, and have certain theoretical and practical values.