Fiber-optic connector is one of the most important optical passive devices in the integral fiber-optic communication systems. Its insertion and return losses have great impact on its performance. In order to ensure the performance of fiber-optic connectors and interchangeability,it is necassary to test its end face geometric parameters. This paper analyzes the principle and the characteristics of the geometry parameters automatic measurement of the optical fiber connector end face and discusses the factors that affect the measurement accuracy. It also makes appropriate improvements. Simulation results show that the proposed approach has characteristics of measurement accuracy and high speed. Therefore,the results show that the proposed method can be effectively used for the geometry parameters automatic measurement of the optical fiber connector end face.